2009 US Open (tennis)

Simon Greul serving to Giovanni Lapentti in Round 1

The first day of the tournaments saw many seeds get through pretty easily in straight sets: Roger Federer, James Blake, Lleyton Hewitt, Nikolay Davydenko and Radek Štěpánek. The day also produced a couple of upsets, when Mikhail Youzhny continued 26th seeded Paul-Henri Mathieu's horrible US Open record by beating him in four. While, tall American John Isner did the same to 28th seeded Victor Hănescu by ending the Romanian's 2009 bid in three with the second set going to a tie-break 16–14. The exciting day continued with a couple of five-set marathons, with Simon Greul defeating Giovanni Lapentti, Guillermo García-López out-lasting Peter Polansky, and Jan Hernych surviving against Rainer Schüttler. The days last match featured America's hope Andy Roddick prevailing over Björn Phau in straight sets in a match that started at 11:00 pm.[17]

Venus Williams returns against Vera Dushevina on the opening day

On the women's side, former world no. 1 Kim Clijsters opened the play, winning over Viktoriya Kutuzova losing only two games. Joining her were defending 2009 Wimbledon and Australian Open champion Serena Williams, Amélie Mauresmo, Victoria Azarenka, Flavia Pennetta, Elena Vesnina, Agnieszka Radwańska, Li Na and Marion Bartoli who all won in two sets. Australian Samantha Stosur was pushed by veteran player Ai Sugiyama in three sets, Daniela Hantuchová got past American Meghann Shaughnessy in three as well. In the first night match, Venus Williams was able to claw her way to avoid an upset to win against Russian Vera Dushevina in a very close three-setter. Venus committed four foot faults in the match.[18] With Venus and Serena getting past the first round, a few American players saw success on the women's side with Vania King, Bethanie Mattek-Sands, and Jill Craybas getting to the second round. Austrian and 28th seeded Sybille Bammer, who defeated Serena Williams in Cincinnati, and 25th seeded Kaia Kanepi were the only casualties of the day.

• Seeds out:
  • Men's Singles: Paul-Henri Mathieu [26], Victor Hănescu [28]
  • Women's Singles: Kaia Kanepi [25], Sybille Bammer [28]
• Schedule of play

Matches on Main Courts[19]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Singles 1st Round	Kim Clijsters [WC]	Viktoriya Kutuzova	6–1, 6–1
Men's Singles 1st Round	Roger Federer [1]	Devin Britton [WC]	6–1, 6–3, 7–5
Women's Singles 1st Round	Serena Williams [2]	Alexa Glatch [WC]	6–4, 6–1
2009 US Open Opening Night Ceremony
Women's Singles 1st Round	Venus Williams [3]	Vera Dushevina	6–7(5–7), 7–5, 6–3
Men's Singles 1st Round	Andy Roddick [5]	Björn Phau	6–1, 6–4, 6–2
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Women's Singles 1st Round	Victoria Azarenka [8]	Alexandra Dulgheru	6–1, 6–1
Men's Singles 1st Round	John Isner	Victor Hănescu [28]	6–1, 7–6(16–14), 7–6(7–5)
Women's Singles 1st Round	Amélie Mauresmo [17]	Tatjana Malek	6–3, 6–4
Men's Singles 1st Round	James Blake [21]	Rubén Ramírez Hidalgo	6–1, 6–4, 7–5
Women's Singles 1st Round	Daniela Hantuchová [22]	Meghann Shaughnessy [PR]	6–2, 4–6, 6–1
Matches on the Grandstand
Event	Winner	Loser	Score
Men's Singles 1st Round	Mikhail Youzhny	Paul-Henri Mathieu [26]	2–6, 7–5, 6–0, 6–2
Women's Singles 1st Round	Flavia Pennetta	Edina Gallovits	6–0, 6–4
Women's Singles 1st Round	Vera Zvonareva [7]	Nuria Llagostera Vives	6–0, 6–4
Men's Singles 1st Round	Lleyton Hewitt [31]	Thiago Alves	6–0, 6–3, 6–4
Colored background indicates a night match

On the men's side, many seeded players got through in straight sets: 2008 US Open runner-up Andy Murray, 2008 Australian Open Champion Novak Djokovic, Tomáš Berdych, Jo-Wilfried Tsonga, Fernando González, and Fernando Verdasco. No. 30 seed Victor Troicki survived a five-set scare, 6–3, 6–3, 1–6, 2–6, 6–1. However, some seeds failed to be as lucky and fell in the first round with Ivo Karlović falling to Iván Navarro and Igor Andreev falling to American Jesse Witten, both in straight sets, while Stan Wawrinka fell in five. American players were once again successful, with 5 out of the 11 getting past the first round: Sam Querrey, Kevin Kim, Jesse Witten, Jesse Levine, and Taylor Dent.

On the women's side, the first major upset of the tournament occurred with Ukrainian Kateryna Bondarenko upsetting 11th seed and former world no. 1 Ana Ivanovic. Ivanovic committed 50 unforced errors. In the second round, her sister Alona Bondarenko, 2009 French Open champion Svetlana Kuznetsova, Maria Sharapova, Elena Dementieva, Nadia Petrova and Tathiana Garbin all advanced. Other seeded players that were eliminated in the first round were 32nd seed Ágnes Szávay, losing to Israeli Shahar Pe'er in straight sets, Alisa Kleybanova, losing to Petra Kvitová in three and Virginie Razzano losing to Yanina Wickmayer in straight sets. Day 2 was a good day for women American players with three out of five getting through: Melanie Oudin, Shenay Perry, and Christina McHale. However, world no. 1 Dinara Safina struggled in her match against Olivia Rogowska but manage to survive, winning in three sets[20]

On the doubles side, the day was led by 2nd seeded Daniel Nestor and Nenad Zimonjić, who won in straight sets, and the only seeds that were eliminated were No. 15 seed Stephen Huss and Ross Hutchins.

• Seeds out:
  • Men's Singles: Stan Wawrinka [19], Ivo Karlović [27], Igor Andreev [29]
  • Women's Singles: Ana Ivanovic [11], Virginie Razzano [16], Alisa Kleybanova [27], Ágnes Szávay [32]
  • Men's Doubles: Stephen Huss / Ross Hutchins [15]
• Schedule of play

Matches on Main Courts[21]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Singles 1st Round	Svetlana Kuznetsova [6]	Julia Görges	6–3, 6–2
Women's Singles 1st Round	Dinara Safina [1]	Olivia Rogowska [WC]	6–7(5–7), 6–2, 6–4
Men's Singles 1st Round	Novak Djokovic [4]	Ivan Ljubičić	6–3, 6–1, 6–3
Women's Singles 1st Round	Maria Sharapova [29]	Tsvetana Pironkova	6–3, 6–0
Men's Singles 1st Round	Andy Murray [2]	Ernests Gulbis	7–5, 6–3, 7–5
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Women's Singles 1st Round	Caroline Wozniacki [9]	Galina Voskoboeva	6–4, 6–0
Men's Singles 1st Round	Tomáš Berdych [17]	Wayne Odesnik	7–5, 6–4, 6–4
Women's Singles 1st Round	Jelena Janković [5]	Roberta Vinci	6–2, 6–3
Men's Singles 1st Round	Sam Querrey [22]	Michael Yani [Q]	6–3, 7–5, 6–4
Women's Singles 1st Round	Kateryna Bondarenko	Ana Ivanovic [11]	2–6, 6–3, 7–6(9–7)
Matches on the Grandstand
Event	Winner	Loser	Score
Men's Singles 1st Round	Jo-Wilfried Tsonga [7]	Chase Buchanan [WC]	6–0, 6–2, 6–1
Women's Singles 1st Round	Melanie Oudin	Anastasia Pavlyuchenkova	6–1, 6–2
Men's Singles 1st Round	Marin Čilić [16]	Ryan Sweeting	7–6(7–2), 6–4, 7–6(7–4)
Women's Singles 1st Round	Elena Dementieva [4]	Camille Pin [Q]	6–1, 6–2
Colored background indicates a night match

The men's side saw Rafael Nadal playing his first match at the 2009 US Open and winning against his friend Richard Gasquet. He was joined by no. 1 seed Roger Federer, Juan Martín del Potro, Gaël Monfils, Lleyton Hewitt, Juan Carlos Ferrero, and Gilles Simon, who all won in straight sets, while David Ferrer, Nicolás Almagro and American Robby Ginepri won in 4. Joining them was Austrian Jürgen Melzer, who defeated Marat Safin in Safin's last Grand Slam match.[22]

On the women's side, upsets continued with Amélie Mauresmo falling to Aleksandra Wozniak, Anabel Medina Garrigues losing to Kirsten Flipkens, and dark horse favorite Australian Samantha Stosur losing to American Vania King,[23] all in straight sets, while Marion Bartoli and Agnieszka Radwańska both fell to resurging players Kim Clijsters and Maria Kirilenko in three. However, the day also saw half of the seeds getting through easily and was led by former champion Venus Williams and Flavia Pennetta, who won in double bagel, Victoria Azarenka, Francesca Schiavone, Elena Vesnina, and Li Na. The day ended for the first time in over 30 years in the US Open history by a women's match, which saw Serena Williams dispatching Melinda Czink in just 53 minutes.[24]

On the doubles side, there were a couple of major upsets: sixth seeded Mariusz Fyrstenberg and Marcin Matkowski, fell in their opening round, as well as unseeded world no. 8 in doubles Lisa Raymond and her partner Shenay Perry.

• Seeds out:
  • Women's Singles: Agnieszka Radwańska [12], Marion Bartoli [14], Samantha Stosur [15], Amélie Mauresmo [17], Anabel Medina Garrigues [20]
  • Men's Doubles: Mariusz Fyrstenberg / Marcin Matkowski [6], Ashley Fisher / Jordan Kerr [14]
  • Women's Doubles: Raquel Kops-Jones / Abigail Spears [15]
• Schedule of play

Matches on Main Courts[25]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Singles 2nd Round	Aleksandra Wozniak	Amélie Mauresmo [17]	6–4, 6–0
Women's Singles 2nd Round	Venus Williams [3]	Bethanie Mattek-Sands	6–4, 6–2
Men's Singles 1st Round	Rafael Nadal [3]	Richard Gasquet	6–2, 6–2, 6–3
Men's Singles 2nd Round	Roger Federer [1]	Simon Greul	6–3, 7–5, 7–5
Women's Singles 2nd Round	Serena Williams [2]	Melinda Czink	6–1, 6–1
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Women's Singles 2nd Round	Flavia Pennetta [10]	Sania Mirza	6–0, 6–0
Men's Singles 1st Round	Jürgen Melzer	Marat Safin	1–6, 6–4, 6–3, 6–4
Women's Singles 2nd Round	Kim Clijsters [WC]	Marion Bartoli [14]	5–7, 6–1, 6–2
Men's Singles 1st Round	Juan Martín del Potro [6]	Juan Mónaco	6–3, 6–3, 6–1
Matches on the Grandstand
Event	Winner	Loser	Score
Men's Singles 1st Round	Gaël Monfils [13]	Jérémy Chardy	6–1, 6–4, 6–3
Women's Singles 2nd Round	Vera Zvonareva [7]	Anna Chakvetadze	3–6, 6–1, 6–1
Women's Singles 2nd Round	Victoria Azarenka [8]	Barbora Záhlavová-Strýcová [Q]	6–2, 6–1
Women's Singles 2nd Round	Vania King [WC]	Samantha Stosur [15]	7–5, 6–4
Men's Singles 2nd Round	Lleyton Hewitt [31]	Juan Ignacio Chela [PR]	6–3, 6–3, 6–4
Colored background indicates a night match

Day 4 continued the success of the top men's seeds, with no. 4 seed Novak Djokovic dispatching Carsten Ball 6–2, 6–4, 6–4. He was joined by 2009 French Open runner-up Robin Söderling, 2009 French Open semifinalist Tommy Haas, 2009 Hamburg Open Champion Nikolay Davydenko, Philipp Kohlschreiber, and Tommy Robredo. The Americans once again took advantage of their home court, with four of them winning their matches: James Blake surviving against Olivier Rochus in four, with Blake committing 53 unforced errors, John Isner, Jesse Witten, and Sam Querrey. Andy Roddick once again got through easily against Marc Gicquel 6–1, 6–4, 6–4. He produced 33 winners and only 10 unforced errors in the last match of the night.

The women's side received a lot of buzz, with 17-year-old American Melanie Oudin upsetting hot favorite and US Open Series champion Elena Dementieva in the second round. Yaroslava Shvedova of Kazakhstan upset last year's runner-up Jelena Janković in three sets.[26] Seeded players who joined Dementieva and Janković were Alona Bondarenko, who lost to Gisela Dulko, and Patty Schnyder, who lost in straight sets, while Sabine Lisicki lost in three to the last Australian and qualifier on the draw Anastasia Rodionova. No. 1 seed Dinara Safina once again survived a scare from Kristina Barrois, winning 6(5)–7, 6–2, 6–3. However, a few seeded players got through quite easily, led by Russians Svetlana Kuznetsova, Maria Sharapova, Nadia Petrova, and Danish player Caroline Wozniacki. Unseeded players who got through in straight sets were Kateryna Bondarenko, who eliminated Ivanovic, Shahar Pe'er, Sara Errani, and Petra Kvitová.

On the doubles side, it was the opposite, with all of the women's doubles seeds getting through. However, on the men's side, the highest seeded players who fell were no. 9 seeded Łukasz Kubot and Oliver Marach, losing to veteran doubles players Leoš Friedl and Jaroslav Levinský.

• Seeds out:
  • Women's Singles: Elena Dementieva [4], Jelena Janković [5], Patty Schnyder [19], Sabine Lisicki [23], Alona Bondarenko [30]
  • Men's Doubles: Łukasz Kubot / Oliver Marach [9], Simon Aspelin / Paul Hanley [12], Travis Parrott / Filip Polášek [13]
• Schedule of play

Matches on Main Courts[27]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Singles 2nd Round	Melanie Oudin	Elena Dementieva [4]	5–7, 6–4, 6–3
Women's Singles 2nd Round	Yaroslava Shvedova	Jelena Janković [5]	6–3, 6–7(4–7), 7–6(8–6)
Men's Singles 2nd Round	James Blake [21]	Olivier Rochus	6–4, 3–6, 7–6(8–6), 6–3
Women's Singles 2nd Round	Maria Sharapova [29]	Christina McHale [WC]	6–2, 6–1
Men's Singles 2nd Round	Andy Roddick [5]	Marc Gicquel	6–1, 6–4, 6–4
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Women's Singles 2nd Round	Dinara Safina [1]	Kristina Barrois	6–7(5–7), 6–2, 6–3
Men's Singles 2nd Round	Sam Querrey [22]	Kevin Kim	7–5, 6–7(6–8), 6–4, 6–4
Women's Singles 2nd Round	Svetlana Kuznetsova [6]	Anastasija Sevastova	6–4, 6–2
Men's Singles 2nd Round	Novak Djokovic [4]	Carsten Ball [Q]	6–3, 6–4, 6–4
Matches on the Grandstand
Event	Winner	Loser	Score
Men's Singles 2nd Round	Tommy Haas [20]	Robert Kendrick	6–4, 6–4, 7–6(7–3)
Women's Singles 2nd Round	Caroline Wozniacki [9]	Petra Martić	6–1, 6–0
Women's Doubles 1st Round	Serena Williams [4] Venus Williams [4]	Julia Görges Arantxa Parra Santonja	6–2, 6–2
Men's Doubles 1st Round	Bob Bryan [1] Mike Bryan [1]	José Acasuso Martín Vassallo Argüello	6–3, 6–4
Men's Singles 2nd Round	John Isner	Marsel İlhan [Q]	6–3, 6–4, 7–6(7–1)
Colored background indicates a night match

The fifth day of the US Open saw many seeds struggle on the men's side, with no. 30 seed Viktor Troicki losing to Julien Benneteau in four sets, and no. 18 seed David Ferrer losing to José Acasuso in five sets. This day also saw Rafael Nadal[28] and Andy Murray struggle with their matches, with both of them being pushed to four sets. A couple of seeds were also pushed to four: Tomáš Berdych and Fernando González. No. 24 seed Juan Carlos Ferrero and no. 16 seed Marin Čilić both survived their matches, despite losing the first two sets. Many victors were pushed to five sets: Nicolás Almagro, a returning Taylor Dent, and Denis Istomin. Although many seeds struggled, French seeds got through easily with Jo-Wilfried Tsonga, Gaël Monfils, and Gilles Simon winning their matches on straight sets. They were joined by Argentine Juan Martín del Potro, who also won in straight sets.

On the women's side, Victoria Azarenka lost to Italian Francesca Schiavone in three sets after Azarenka double-faulted on a match point.[29] The rest of the matches were all won in straight sets, led by Serena Williams, who defeated María José Martínez Sánchez, who had a controversial match at the 2009 French Open. She was joined by Daniela Hantuchová, who crushed American Vania King, Li Na, Kim Clijsters, Flavia Pennetta, and Venus Williams. Elena Vesnina lost to 7th seed Vera Zvonareva.

On the women's side, seventh seeded Hsieh Su-wei and Peng Shuai were ousted by the American team of Alexa Glatch and Carly Gullickson. They were followed by no. 14 seed Sania Mirza and Francesca Schiavone, who lost to Shahar Pe'er and Gisela Dulko in a tight three-setter.

• Seeds out:
  • Men's Singles: David Ferrer [18], Viktor Troicki [30]
  • Women's Singles: Victoria Azarenka [8], Elena Vesnina [31]
  • Women's Doubles: Hsieh Su-wei / Peng Shuai [7], Sania Mirza / Francesca Schiavone [14]
  • Mixed Doubles: Nadia Petrova / Max Mirnyi [6]
• Schedule of play

Matches on Main Courts[30]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Singles 3rd Round	Daniela Hantuchová [22]	Vania King [WC]	6–2, 6–2
Women's Singles 3rd Round	Serena Williams [2]	María José Martínez Sánchez	6–3, 7–5
Men's Singles 2nd Round	Andy Murray [2]	Paul Capdeville	6–2, 3–6, 6–0, 6–2
Women's Singles 3rd Round	Venus Williams [3]	Magdaléna Rybáriková	6–2, 7–5
Men's Singles 2nd Round	Rafael Nadal [3]	Nicolas Kiefer	6–0, 3–6, 6–3, 6–4
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Women's Singles 3rd Round	Flavia Pennetta [10]	Aleksandra Wozniak	6–1, 6–1
Men's Singles 2nd Round	Juan Martín del Potro [6]	Jürgen Melzer	7–6(8–6), 6–3, 6–3
Men's Singles 2nd Round	Nicolás Almagro [32]	Robby Ginepri	6–7(7–9), 6–2, 6–3, 4–6, 6–4
Women's Singles 3rd Round	Kim Clijsters [WC]	Kirsten Flipkens	6–0, 6–2
Matches on the Grandstand
Event	Winner	Loser	Score
Men's Singles 2nd Round	Jo-Wilfried Tsonga [7]	Jarkko Nieminen	7–5, 6–3, 6–4
Women's Singles 3rd Round	Francesca Schiavone [26]	Victoria Azarenka [8]	4–6, 6–2, 6–2
Women's Singles 3rd Round	Li Na [18]	Maria Kirilenko	6–4, 6–2
Men's Singles 2nd Round	Taylor Dent	Iván Navarro	6–4, 5–7, 6–7(1–7), 7–5, 7–6(11–9)
Colored background indicates a night match

Five-time defending champion Swiss Roger Federer took out the 2001 Champion Lleyton Hewitt in four sets after losing the first to set up a match-up with Spaniard Tommy Robredo in the fourth round, who beat American James Blake in three sets. Swede Robin Söderling took out the young American Sam Querrey in four sets in order to advance to face Russian Nikolay Davydenko in the fourth round, who won his match against Swiss qualifier Marco Chiudinelli in straight sets. One-time slam champion Novak Djokovic won in a four-set match after losing the first set against American qualifier Jesse Witten in order to advance to the fourth round against Czech Radek Štěpánek, who won in a match against German Philipp Kohlschreiber in four sets after losing the first. Spaniard Fernando Verdasco sent German Tommy Haas packing in a brutal five-set match, Verdasco met American John Isner in the next round because Isner eliminated the 2003 champion Andy Roddick from the tournament in another five-set battle.[31]

American Melanie Oudin defeated three-time slam champion and 2006 US Open Champion Russian Maria Sharapova in three sets, losing the first and winning the next two to advance into the fourth round. Russian Nadia Petrova defeated Chinese Zheng Jie 6–4, 6–1 to set up a match with Melanie Oudin in the fourth round. Danish Caroline Wozniacki took out doubles partner Romanian Sorana Cîrstea in the third round in 6–3, 6–2, which allowed her to set up a match with Svetlana Kuznetsova in the fourth round, after Kuznetsova beat Israeli Shahar Pe'er 7–5, 6–1. Ukrainian Kateryna Bondarenko bested Australian qualifier Anastasia Rodionova in the third round 7-6^(7–4), 6–4, which allowed her to meet Argentine Gisela Dulko, who beat Kazakhstan's Yaroslava Shvedova 6–3, 6–4. Czech Petra Kvitová took down top-seeded world no. 1 Russian Dinara Safina[32] in three up-and-down sets 4–6, 6–2, 7-6^(7–5). This set up a fourth-round match with Belgian Yanina Wickmayer, who took down Italian Sara Errani with a score of 6–3, 6–4.

• Seeds out:
  • Men's Singles: Andy Roddick [5], Tommy Haas [20], James Blake [21], Sam Querrey [22], Philipp Kohlschreiber [23], Lleyton Hewitt [31]
  • Women's Singles: Dinara Safina [1], Zheng Jie [21], Sorana Cîrstea [24], Maria Sharapova [29]
  • Men's Doubles: Bruno Soares / Kevin Ullyett [8], František Čermák / Michal Mertiňák [10], Marcelo Melo / André Sá [16]
• Schedule of play

Matches on Main Courts[33]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Men's Singles 3rd Round	Roger Federer [1]	Lleyton Hewitt [31]	4–6, 6–3, 7–5, 6–4
Women's Singles 3rd Round	Melanie Oudin	Maria Sharapova [29]	3–6, 6–4, 7–5
Men's Singles 3rd Round	John Isner	Andy Roddick [5]	7–6(7–3), 6–3, 3–6, 5–7, 7–6(7–5)
Men's Singles 3rd Round	Tommy Robredo [14]	James Blake [21]	7–6(7–2), 6–4, 6–4
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Men's Singles 3rd Round	Novak Djokovic [4]	Jesse Witten [Q]	6–7(2–7), 6–3, 7–6(7–2), 6–4
Men's Singles 3rd Round	Fernando Verdasco [10]	Tommy Haas [20]	3–6, 7–5, 7–6(10–8), 1–6, 6–4
Women's Doubles 2nd Round	Serena Williams [4] Venus Williams [4]	Chan Yung-jan Katarina Srebotnik	7–5, 6–1
Women's Singles 3rd Round	Petra Kvitová	Dinara Safina [1]	6–4, 2–6, 7–6(7–5)
Matches on the Grandstand
Event	Winner	Loser	Score
Men's Singles 3rd Round	Radek Štěpánek [15]	Philipp Kohlschreiber [23]	4–6, 6–2, 6–3, 6–3
Women's Singles 3rd Round	Nadia Petrova [13]	Zheng Jie [21]	6–4, 6–1
Men's Singles 3rd Round	Robin Söderling [12]	Sam Querrey [22]	6–2, 7–5, 6–7(6–8), 6–1
Women's Singles 3rd Round	Svetlana Kuznetsova [6]	Shahar Pe'er	7–5, 6–1
Women's Singles 3rd Round	Caroline Wozniacki [9]	Sorana Cîrstea [24]	6–3, 6–2
Colored background indicates a night match

Fernando González returning to Tomáš Berdych

Spaniards Rafael Nadal and Nicolás Almagro played in a third-round match which was won in straight sets by Rafael Nadal, who would face Frenchman Gaël Monfils in the fourth round. Monfils beat Argentine José Acasuso in straight sets. Chilean Fernando González won in straight sets against Czech Tomáš Berdych and would face Frenchman Jo-Wilfried Tsonga, who beat fellow Frenchman Julien Benneteau in straight sets. Spaniard Juan Carlos Ferrero won over higher-seeded Frenchman Gilles Simon. Ferrero advanced to play Argentine Juan Martín del Potro, who won in four sets over Austrian Daniel Köllerer. Croatian Marin Čilić won in three easy sets over Denis Istomin of Uzbekistan to face Briton Andy Murray, who beat American Taylor Dent in three sets.

Elena Vesnina in a doubles match with Maria Kirilenko

American Serena Williams beat Slovakian Daniela Hantuchová in two sets that totaled 64 minutes of action to face in the quarterfinals Italian Flavia Pennetta, who beat Russian Vera Zvonareva. Zvonareva had six match points in the second set, but had a meltdown and lost the third set 6–0.[34] Chinese Li Na won in two sets over Italian Francesca Schiavone. Na advanced to play wild-card Belgian Kim Clijsters, who took down third-seeded Venus Williams in three sets after two love games, 6-0 for Clijsters and 0-6 for Venus Williams. The third set went to Clijsters in one break of Venus's serve 6–4.

• Seeds out:
  • Men's Singles: Gilles Simon [9], Tomáš Berdych [17], Nicolás Almagro [32]
  • Women's Singles: Venus Williams [3], Vera Zvonareva [7], Daniela Hantuchová [22], Francesca Schiavone [26]
  • Men's Doubles: Martin Damm / Robert Lindstedt [11]
  • Women's Doubles: Anabel Medina Garrigues / Virginia Ruano Pascual [2], Anna-Lena Grönefeld / Patty Schnyder [9]
• Schedule of play

Matches on Main Courts[35]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Singles 4th Round	Serena Williams [2]	Daniela Hantuchová [22]	6–2, 6–0
Men's Singles 3rd Round	Rafael Nadal [3]	Nicolás Almagro [32]	7–5, 6–4, 6–4
Women's Singles 4th Round	Kim Clijsters [WC]	Venus Williams [3]	6–0, 0–6, 6–4
Women's Singles 4th Round	Flavia Pennetta [10]	Vera Zvonareva [7]	3–6, 7–6(8–6), 6–0
Men's Singles 3rd Round	Andy Murray [2]	Taylor Dent [WC]	6–3, 6–2, 6–2
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Men's Singles 3rd Round	Juan Carlos Ferrero [24]	Gilles Simon [9]	1–6, 6–4, 7–6(7–5), 1–0, retired
Women's Singles 4th Round	Li Na [18]	Francesca Schiavone [26]	6–2, 6–3
Men's Singles 3rd Round	Juan Martín del Potro [6]	Daniel Köllerer	6–1, 3–6, 6–3, 6–3
Women's Doubles 3rd Round	Serena Williams [4] Venus Williams [4]	Sorana Cîrstea Caroline Wozniacki	6–4, 6–2
Matches on the Grandstand
Event	Winner	Loser	Score
Women's Doubles 3rd Round	Maria Kirilenko [10] Elena Vesnina [10]	Alexa Glatch Carly Gullickson	7–6(7–3), 6–2
Men's Singles 3rd Round	Fernando González [11]	Tomáš Berdych [17]	7–5, 6–4, 6–4
Men's Singles 3rd Round	Jo-Wilfried Tsonga [7]	Julien Benneteau	7–6(7–4), 6–2, 6–4
Men's Singles 3rd Round	Gaël Monfils [13]	José Acasuso	6–3, 6–4, 1–0, retired
Colored background indicates a night match

Swede Robin Söderling advanced to the quarterfinals with a retirement of Russian Nikolay Davydenko to face the Swiss Roger Federer, who beat Spaniard Tommy Robredo in straight sets. This would mark the third time the duo of Federer and Söderling has met in a Grand Slam in 2009, including the 2009 French Open final and the 2009 Wimbledon Championships fourth round, which were both won by Federer. Spaniard Fernando Verdasco beat American John Isner to advance into the quarterfinals, which means for the first time in US Open history no American male advanced into the quarterfinals of the tournament.[36] Verdasco would face Serbian Novak Djokovic in the quarterfinals because Djokovic took down Czech Radek Štěpánek in straight sets. After defeating Štěpánek, Djokovic provided a light-hearted moment for the crowd along with former tennis great and current commentator John McEnroe. Djokovic began by impersonating McEnroe, who grew up in the nearby Queens neighborhood of Douglaston. He then motioned for McEnroe to come down from the press box; McEnroe obliged, mimicking some of Djokovic's mannerisms before the two played a few points. The two then embraced at the net.

The first match featured Ukrainian Kateryna Bondarenko making quick work of Argentine Gisela Dulko in double-bagel sets in 47 minutes. Dulko had beaten Bondarenko's sister, Alona Bondarenko, in the second round. with Dulko making 20 unforced errors compared to Bondarenko's 6, while Bondarenko made 17 winners to Dulko's 7.[37] Melanie Oudin advanced to her first Grand Slam quarterfinal with a 1–6, 7–6, 6–3 win over No. 13 seed Nadia Petrova. Belgian Yanina Wickmayer won in a three-set match against Czech Petra Kvitová to advance into the quarterfinals, making two Belgians who have advanced to the quarterfinalss for the first time since the 2003 US Open tournament. Wickmayer took advantage of the Czech's unforced errors and won the match 4–6, 6–4, 7–5. Caroline Wozniacki defeated Svetlana Kuznetsova 2–6, 7–6, 7–6 in an absorbing contest that kicked off Monday's night session on Arthur Ashe Stadium.

• Seeds out:
  • Men's Singles: Nikolay Davydenko [8], Tommy Robredo [14], Radek Štěpánek [15]
  • Women's Singles: Svetlana Kuznetsova [6], Nadia Petrova [13]
  • Women's Singles: Daniela Hantuchová / Ai Sugiyama [5], Vania King / Monica Niculescu [12]
  • Mixed Doubles: Lisa Raymond / Marcin Matkowski [3], Rennae Stubbs / Robert Lindstedt [7], Bethanie Mattek-Sands / Nenad Zimonjić [8]
• Schedule of play

Matches on Main Courts[38]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Singles 4th Round	Kateryna Bondarenko	Gisela Dulko	6–0, 6–0
Women's Singles 4th Round	Melanie Oudin	Nadia Petrova [13]	1–6, 7–6(7–2), 6–3
Men's Singles 4th Round	Roger Federer [1]	Tommy Robredo [14]	7–5, 6–2, 6–2
Women's Singles 4th Round	Caroline Wozniacki [9]	Svetlana Kuznetsova [6]	2–6, 7–6(7–5), 7–6(7–3)
Men's Singles 4th Round	Novak Djokovic [4]	Radek Štěpánek [15]	6–1, 6–3, 6–3
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Men's Singles 4th Round	Robin Söderling [12]	Nikolay Davydenko [8]	7–5, 3–6, 6–2, retired
Women's Singles 4th Round	Yanina Wickmayer	Petra Kvitová	4–6, 6–4, 7–5
Men's Singles 4th Round	Fernando Verdasco [10]	John Isner	4–6, 6–4, 6–4, 6–4
Mixed Doubles Quarterfinals	Liezel Huber [1] Mahesh Bhupathi [1]	Bethanie Mattek-Sands [8] Nenad Zimonjić [8]	6–4, 6–3
Matches on the Grandstand
Event	Winner	Loser	Score
Men's Doubles 3rd Round	Lukáš Dlouhý [4] Leander Paes [4]	Julian Knowle Jürgen Melzer	7–5, 6–4
Men's Doubles 3rd Round	Daniel Nestor [2] Nenad Zimonjić [2]	Robert Kendrick Janko Tipsarević	6–2, 5–7, 6–4
Women's Doubles 3rd Round	Yan Zi [11] Zheng Jie [11]	Daniela Hantuchová [5] Ai Sugiyama [5]	4–6, 6–4, 6–4
Mixed Doubles Quarterfinals	Cara Black [2] Leander Paes [2]	Rennae Stubbs [7] Robert Lindstedt [7]	7–5, 3–6, [10–6]
Colored background indicates a night match

In the fourth round of men's singles, Juan Martín del Potro won in straight sets over 2003 finalist Juan Carlos Ferrero 6–3, 6–3, 6–3. This set up a quarterfinal clash with Marin Čilić, who upset second-seeded Andy Murray in straight sets as well. In a closely contested match Fernando González prevailed over Frenchman Jo-Wilfried Tsonga in four sets. The 11th-seeded Gonzalez advanced to his second US Open quarterfinal, having reached this stage seven years ago. This set up a meeting with Rafael Nadal in the quarterfinals who outlasted the last Frenchman Gaël Monfils in four sets.

Belgian wild-card Kim Clijsters won over Chinese Li Na in two sets 6–2, 6–4 to make it to the semifinals. The next match featured American Serena Williams who defeated a gritty competitor in Italian Flavia Pennetta in the quarterfinals in two hard-fought sets. This set up a meeting in the semifinals with Clijsters, who defeated Serena's sister Venus in the fourth round.

• Seeds out:
  • Men's Singles: Andy Murray [2], Jo-Wilfried Tsonga [7], Gaël Monfils [13], Juan Carlos Ferrero [24]
  • Women's Singles: Flavia Pennetta [10], Li Na [18]
  • Men's Doubles: Daniel Nestor / Nenad Zimonjić [2], Wesley Moodie / Dick Norman [7]
  • Women's Doubles: Bethanie Mattek-Sands / Nadia Petrova [8], Maria Kirilenko / Elena Vesnina [10]
  • Mixed Doubles: Liezel Huber / Mahesh Bhupathi [1], Hsieh Su-wei / Kevin Ullyett [5]
• Schedule of play

Matches on Main Courts[39]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Men's Doubles Quarterfinals	Bob Bryan [1] Mike Bryan [1]	Carsten Ball [Alt] Chris Guccione [Alt]	6–4, 7–6(7–2)
Women's Singles Quarterfinals	Kim Clijsters [WC]	Li Na [18]	6–2, 6–4
Men's Singles 4th Round	Marin Čilić [16]	Andy Murray [2]	7–5, 6–2, 6–2
Women's Singles Quarterfinals	Serena Williams [2]	Flavia Pennetta [10]	6–4, 6–3
Men's Singles 4th Round	Rafael Nadal [3]	Gaël Monfils [13]	6–7(3–7), 6–3, 6–1, 6–3
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Men's Doubles Quarterfinals	Lukáš Dlouhý [4] Leander Paes [4]	Wesley Moodie[7] Dick Norman [7]	6–3, 5–7, 6–4
Men's Singles 4th Round	Juan Martín del Potro [6]	Juan Carlos Ferrero [24]	6–3, 6–3, 6–3
Women's Doubles Quarterfinals	Samantha Stosur [3] Rennae Stubbs [3]	Bethanie Mattek-Sands [8] Nadia Petrova [8]	6–2, 6–3
Men's Singles 4th Round	Fernando González [11]	Jo-Wilfried Tsonga [7]	3–6, 6–3, 7–6(7–3), 6–4
Matches on the Grandstand
Event	Winner	Loser	Score
Women's Doubles Quarterfinals	Alisa Kleybanova [13] Ekaterina Makarova [13]	Maria Kirilenko [10] Elena Vesnina [10]	6–3, 2–6, 6–4
Men's Doubles Quarterfinals	Mahesh Bhupathi [3] Mark Knowles [3]	Ivan Ljubičić Michaël Llodra	6–4, 4–6, 7–6(7–4)
Mixed Doubles Semifinals	Cara Black [2] Leander Paes [2]	Hsieh Su-wei [5] Kevin Ullyett [5]	6–2, 3–6, [10–5]
Men's Doubles Semifinals	Max Mirnyi [5] Andy Ram [5]	Daniel Nestor [2] Nenad Zimonjić [2]	6–7(4–7), 6–4, 6–0
Colored background indicates a night match

The first quarterfinals match in the Men's side featured no. 4 seed Novak Djokovic taking on no. 10 seed Fernando Verdasco, with Novak Djokovic prevailing over Fernando Verdasco 7–6, 1–6, 7–5, 6–2 to reach his third straight semi-finals in the US Open. The next match saw Robin Söderling against Roger Federer. Federer defeated Söderling in four sets: 6–0, 6–3, 6–7, 7–6.

The third quarterfinals match and the first of the day for the Women's side featured Belgian Yanina Wickmayer beating Kateryna Bondarenko of Ukraine in two sets, joining Belgian Kim Clijsters in the semi-finals. This set up a semifinal match with Caroline Wozniacki from Denmark, who defeated American Melanie Oudin in two sets 6–2, 6–2.

• Seeds out:
  • Men's Singles: Fernando Verdasco [10], Robin Söderling [12]
  • Men's Doubles: Bob Bryan / Mike Bryan [1], Max Mirnyi / Andy Ram [5]
  • Women's Doubles: Nuria Llagostera Vives / María José Martínez Sánchez [6], Yan Zi / Zheng Jie [11]
• Schedule of play

Matches on Main Courts[40]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Men's Doubles Semifinals	Lukáš Dlouhý [4] Leander Paes [4]	Bob Bryan [1] Mike Bryan [1]	6–4, 3–6, 7–6(8–6)
Women's Singles Quarterfinals	Yanina Wickmayer	Kateryna Bondarenko	7–5, 6–4
Men's Singles Quarterfinals	Novak Djokovic [4]	Fernando Verdasco [10]	7–6(7–2), 1–6, 7–5, 6–2
Women's Singles Quarterfinals	Caroline Wozniacki [9]	Melanie Oudin	6–2, 6–2
Men's Singles Quarterfinals	Roger Federer [1]	Robin Söderling [12]	6–0, 6–3, 6–7(6–8), 7–6(8–6)
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Junior Boys' Singles 2nd Round	Bernard Tomic [3]	Alexander Domijan	4–6, 7–5, 6–1
Women's Doubles Quarterfinals	Cara Black [1] Liezel Huber [1]	Nuria Llagostera Vives [6] María José Martínez Sánchez [6]	6–3, 2–6, 7–5
Women's Doubles Quarterfinals	Serena Williams [4] Venus Williams [4]	Yan Zi [11] Zheng Jie [11]	7–5, 6–4
Men's Doubles Semifinals	Mahesh Bhupathi [3] Mark Knowles [3]	Max Mirnyi [5] Andy Ram [5]	6–4, 6–2
Colored background indicates a night match

Argentinie Juan Martín del Potro defeated Croatian Marin Čilić in four sets and became the third of his country to qualify for the semifinals (after Vilas and Nalbandian). The other quarterfinal match between Rafael Nadal and Fernando González was suspended due to bad weather and would be resumed on Friday. Rafael Nadal was leading 7-6(4), 6-6(3-2) when play was stopped.

The Williams sisters defeated Russians Alisa Kleybanova and Ekaterina Makarova in three sets and qualified for the final. The mixed doubles final saw Americans Carly Gullickson and Travis Parrott claim the title in straight sets over Zimbabwe's Cara Black and Indian Leander Paes.

Seeded players out

• Men's Singles: Marin Čilić
• Women's Doubles: Alisa Kleybanova / Ekaterina Makarova
• Mixed Doubles: Cara Black / Leander Paes

Schedule of play

Matches on Main Courts[41]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Doubles Semifinals	Serena Williams [4] Venus Williams [4]	Alisa Kleybanova [13] Ekaterina Makarova [13]	7–6(4), 3–6, 6–2
Mixed Doubles Finals	Carly Gullickson Travis Parrott	Cara Black [2] Leander Paes [2]	6–2, 6–4
Men's Singles Quarterfinals	Juan Martín del Potro [6]	Marin Čilić [16]	4–6, 6–3, 6–2, 6–1
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Junior Boys' Singles 3rd Round	Yuki Bhambri [1]	Jack Sock	6–4, 6–4
Wheelchair Women's Singles Quarterfinals	Esther Vergeer [1]	Florence Gravellier	6–2, 7–5
Junior Girls' Singles 3rd Round	Beatrice Capra [16]	Asia Muhammad	3–6, 6–1, 6–1
Wheelchair Men's Singles Quarterfinals	Shingo Kunieda [1]	Martin Legner	6–2, 6–0
Colored background indicates a night match

All the matches that should have been played this day were postponed due to the continued rain.

Schedule of play

Rafael Nadal needed 34 minutes to finish off Fernando González in their rain-interrupted quarterfinal, advancing 7–6, 7–6, 6–0 at the Arthur Ashe Stadium. Nadal led 7-6 and 3–2 in a second-set tiebreak when play was called off late Thursday evening. Precipitation throughout a gloomy Friday rendered play impossible, throwing the schedule into chaos and prompting a resumption on Saturday at noon.

Kim Clijsters won an entry into the women's singles final after a dramatic ending to her semifinal against Serena Williams. After losing the first set 4–6, Williams smashed her racquet into the ground, giving her a code violation warning for racquet abuse from the chair umpire. In the second set, down 5–6 (15–30), Williams had a foot fault called on her second serve, giving Clijsters two match points at 15–40. Williams started yelling at the line umpire, who reported to the chair umpire. As a result, she was penalized for another code violation, for unsportsmanlike conduct, meaning a point penalty for Williams, which meant that Clijsters was awarded the match 6–4 7–5 without playing the match point.[42] Williams later admitted that she was "pretty sure" she did foot fault.[43] After securing her thirteenth straight win at the US Open, Clijsters went on to play Danish youngster Caroline Wozniacki in the final, who beat her unseeded opponent Yanina Wickmayer 6–3 6–3.[44]

Seeded players out

• Men's Singles: Fernando González
• Women's Singles: Serena Williams

Schedule of play

Matches on Main Courts[45]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Men's Singles Quarterfinals	Rafael Nadal [3]	Fernando González [11]	7–6(4), 7–6(2), 6–0
Women's Singles Semifinals	Kim Clijsters [WC]	Serena Williams [2]	6–4, 7–5
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Women's Singles Semifinals	Caroline Wozniacki [9]	Yanina Wickmayer	6–3, 6–3
Colored background indicates a night match

In the first match, Juan Martín del Potro defeated third-ranked Rafael Nadal easily, winning 6–2, 6–2, 6-2 and became the first finalist of the men's singles tournament. Del Potro's convincing victory, which echoed Caroline Wozniacki's takedown of crowd favorite Melanie Oudin in the quarterfinals, set the twenty-year-old Argentine up for his first Grand Slam final.

In the second semifinal of the women's doubles championship Cara Black and Liezel Huber defeated Samantha Stosur and Rennae Stubbs in three sets and they became finalist of the championship to defend which they got in 2008.

Lukáš Dlouhý and Leander Paes won the men's doubles defeating Mahesh Bhupathi and Mark Knowles also in three sets.

Del Potro's opponent in the men's championship match was decided in a contest between world number one Roger Federer and fourth-ranked Novak Djokovic, who lost to Federer in the final of the 2007 U.S. Open. Federer dispatched his opponent in straight sets, winning 7-6(3), 7–5, 7–5, to round out the final two players remaining from an original draw of 128 men's professional tennis players.

In the women's final, unranked Kim Clijsters capped off an impressive return to professional tennis with a win over ninth seed Caroline Wozniacki of Denmark, winning 7–5, 6–3, for her second Grand Slam title.

Seeded players out

• Men's Singles: Rafael Nadal, Novak Djokovic
• Women's Singles: Caroline Wozniacki
• Men's Doubles: Mahesh Bhupathi / Mark Knowles
• Women's Doubles: Samantha Stosur / Rennae Stubbs

Schedule of play

Matches on Main Courts[46]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Men's Singles Semifinals	Juan Martín del Potro [6]	Rafael Nadal [3]	6–2, 6–2, 6–2
Men's Singles Semifinals	Roger Federer [1]	Novak Djokovic [4]	7–6(3), 7–5, 7–5
Women's Singles Final	Kim Clijsters [WC]	Caroline Wozniacki [9]	7–5, 6–3
Matches on Louis Armstrong Stadium
Event	Winner	Loser	Score
Women's Doubles Semifinals	Cara Black [1] Liezel Huber [1]	Samantha Stosur [3] Rennae Stubbs [3]	5–7, 6–3, 6–1
Men's Doubles Final	Lukáš Dlouhý [4] Leander Paes [4]	Mahesh Bhupathi [3] Mark Knowles [3]	3–6, 6–3, 6–2
Colored background indicates a night match

The Williams sisters beat Cara Black and Liezel Huber in straight sets to win the women's doubles championship, 6-2 6–2.

Juan Martín del Potro defeated Roger Federer in five sets. In so doing he became the third Argentine to win the US Open title, and the first South American to win a men's Grand Slam event on a hard court.

There was some controversy during the presentation ceremony when the Master of Ceremonies initially refused to allow del Potro the time to speak in Spanish as he was under pressure from his American television network, CBS, to get the ceremony over with so that it could return to its regularly scheduled programming.[47]

Seeded players out

• Men's Singles: Roger Federer
• Women's Doubles: Cara Black / Liezel Huber

Schedule of play

Matches on Main Courts[48]
Matches on Arthur Ashe Stadium
Event	Winner	Loser	Score
Women's Doubles Final	Serena Williams [4] Venus Williams [4]	Cara Black [1] Liezel Huber [1]	6–2, 6–2
Men's Singles Final	Juan Martín del Potro [6]	Roger Federer [1]	3–6, 7–6(5), 4–6, 7–6(4), 6–2

Juan Martín del Potro defeated Roger Federer, 3–6, 7–6^(7–5), 4–6, 7–6^(7–4), 6–2

• Del Potro won his 3rd title of the year, 7th overall, and 1st and only Grand Slam title.
• Del Potro became the fourth Argentine player, after Guillermo Vilas, Gabriela Sabatini and Gastón Gaudio, to win the Grand Slam final.

Kim Clijsters defeated Caroline Wozniacki, 7–5, 6–3

• Clijsters won for the first time this year and 35th overall. It was her 2nd career Grand Slam, having previously won the 2005 US Open.
• Wozniacki became the first Danish female tennis player to reach the Grand Slam final, and first in the Open Era.

Lukáš Dlouhý / Leander Paes defeated Mahesh Bhupathi / Mark Knowles, 3–6, 6–3, 6–2

• This was the pair of Dlouhý and Paes first US Open Men's Doubles title together, which this is the second slam doubles title they won this year along with the French title.

Serena Williams / Venus Williams defeated Cara Black / Liezel Huber, 6–2, 6–2

• This was the Williams' Sisters second US Open Women's Doubles title, and was the third doubles slam title they won this year along with the Australian Open and Wimbledon.

Carly Gullickson / Travis Parrott defeated Cara Black / Leander Paes, 6–2, 6–4.

• This was the first ever slam title for the pair of Gullickson and Parrott.

Bernard Tomic defeated Chase Buchanan, 6–1, 6–3.

Heather Watson defeated Yana Buchina, 6–4, 6–1.

Márton Fucsovics / Hsieh Cheng-peng defeated Julien Obry / Adrien Puget, 7–6(5), 5–7, [10–1]

Valeria Solovieva / Maryna Zanevska defeated Elena Bogdan / Noppawan Lertcheewakarn, 1–6, 6–3, [10–7]

Shingo Kunieda defeated Maikel Scheffers, 6–0, 6–0

Esther Vergeer defeated Korie Homan, 6–0, 6–0

Stéphane Houdet / Stefan Olsson defeated Maikel Scheffers / Ronald Vink, 6–4, 4–6, 6–4

Korie Homan / Esther Vergeer defeated Daniela DiToro / Florence Gravellier, 6–2, 6–2

Peter Norfolk defeated David Wagner, 6–3, 3–6, 6–3

Nick Taylor / David Wagner defeated Johan Andersson / Peter Norfolk, 6–1, 6–7(5), 6–3