Stefan Kozlov ( STEF-ahn KOZ-lov;[1][2] born 1 February 1998) is an American professional tennis player of Russian descent. He is the son of Russian parents and his father is a tennis coach.[3]
Kozlov made his ATP World Tour debut as a wild card in Newport at the age of 15. He reached two junior Grand Slam finals in 2014 and finished the year at No. 3 in the ITF Junior Combined rankings.
Professional career
Early years
Kozlov made his ATP World Tour debut as a wild card at the Newport tournament in 2013 and lost in the first round. At the age of 16, he defeated his first Top 100 player in Tim Smyczek to reach his first ATP Challenger final in Sacramento, where he lost to Sam Querrey. He has also reached seven career ITF Futures finals and won four of these finals.
Challenger and Futures finals
Singles: 12 (6–6)
Legend (Singles) |
ATP Challenger Tour (2–3) |
ITF Futures Tour (4–3) |
|
Titles by Surface |
Hard (6–6) |
Clay (0–0) |
Grass (0–0) |
|
Result |
W–L |
Date |
Tournament |
Tier |
Surface |
Opponent |
Score |
Loss |
0–1 |
Oct 2014 |
Sacramento, US |
Challenger |
Hard |
Sam Querrey |
3–6, 4–6 |
Loss |
0–2 |
May 2015 |
USA F15, Orange Park |
Futures |
Hard |
Darian King |
2–6, 6–3, 0–6 |
Loss |
0–3 |
May 2015 |
Mexico F3, Mexico City |
Futures |
Hard |
Iván Endara |
1–6, 6–7(3–7) |
Loss |
0–4 |
Oct 2015 |
Belarus F3, Minsk |
Futures |
Hard (i) |
Dzmitry Zhyrmont |
1–6, 4–6 |
Win |
1–4 |
Oct 2015 |
Belarus F4, Minsk |
Futures |
Hard (i) |
Dzmitry Zhyrmont |
6–1, 7–6(7–1) |
Win |
2–4 |
Jan 2016 |
USA F1, Los Angeles |
Futures |
Hard |
Philip Bester |
7–6(9–7), 6–7(3–7), 6–3 |
Win |
3–4 |
Mar 2016 |
Canada F2, Sherbrooke |
Futures |
Hard (i) |
Lloyd Glasspool |
4–6, 6–4, 6–4 |
Loss |
3–5 |
Apr 2016 |
Le Gosier, Guadeloupe |
Challenger |
Hard |
Malek Jaziri |
2–6, 4–6 |
Win |
4–5 |
Apr 2016 |
USA F13, Little Rock |
Futures |
Hard |
Eric Quigley |
6–7(3–7), 6–3, 7–6(12–10) |
Loss |
4–6 |
Oct 2016 |
Suzhou, China |
Challenger |
Hard |
Lu Yen-hsun |
0–6, 1–6 |
Win |
5–6 |
Nov 2016 |
Columbus, US |
Challenger |
Hard (i) |
Tennys Sandgren |
6–1, 2–6, 6–2 |
Win |
6–6 |
Oct 2017 |
Las Vegas, US |
Challenger |
Hard |
Liam Broady |
3–6, 7–5, 6–4 |
Doubles: 9 (4–5)
Legend (Doubles) |
ATP Challenger Tour (2–3) |
ITF Futures Tour (2–2) |
|
Titles by Surface |
Hard (3–2) |
Clay (1–3) |
Grass (0–0) |
|
Result |
W–L |
Date |
Tournament |
Tier |
Surface |
Partner |
Opponents |
Score |
Win |
1–0 |
Nov 2013 |
USA F31, Bradenton |
Futures |
Clay |
Sekou Bangoura |
Devin McCarthy Tommy Mylnikov |
6–2, 6–4 |
Loss |
1–1 |
May 2014 |
Spain F10, Vic |
Futures |
Clay |
Noah Rubin |
Sergio Martos Gornés Pol Toledo Bagué |
2–6, 5–7 |
Win |
2–1 |
Jan 2015 |
Maui, US |
Challenger |
Hard |
Jared Donaldson |
Chase Buchanan Rhyne Williams |
6–3, 6–4 |
Loss |
2–2 |
Oct 2015 |
Croatia F18, Solin |
Futures |
Clay |
Nino Serdarušić |
Zdeněk Kolář Tomas Toman |
4–6, 6–2, [6–10] |
Win |
3–2 |
Mar 2016 |
Canada F1, Gatineau |
Futures |
Hard (i) |
Kaichi Uchida |
Sebastian Fanselow Adrian Sikora |
7–6(7–5), 6–3 |
Win |
4–2 |
Jul 2016 |
Winnetka, US |
Challenger |
Hard |
John-Patrick Smith |
Sekou Bangoura David O'Hare |
6–3, 6–3 |
Loss |
4–3 |
Sep 2016 |
Cary, US |
Challenger |
Hard |
Austin Krajicek |
Philip Bester Peter Polansky |
2–6, 2–6 |
Loss |
4–4 |
Oct 2016 |
Ningbo, China |
Challenger |
Hard |
Akira Santillan |
Jonathan Eysseric Sergiy Stakhovsky |
4–6, 6–7(4–7) |
Loss |
4–5 |
Apr 2017 |
Sarasota, US |
Challenger |
Clay |
Peter Polansky |
Scott Lipsky Jürgen Melzer |
2–6, 4–6 |