Katharina Müller

Müller began skating in 2000 in Bielefeld.[3][4] She took up ice dancing in 2009, teaming up with Justin Gerke.[2] The two were coached by Vladimir Tsvetkov in Berlin.[5] They parted ways after the 2012–13 season, Gerke having decided to retire from competition.[6]

Vitali Schulz arranged a tryout between Müller and Tim Dieck.[6] They teamed up in April 2014, coached by Schulz und James Young in Dortmund.[2] Assigned to two 2014–15 ISU Junior Grand Prix events, they placed 8th in Ljubljana, Slovenia, and 7th in Aichi, Japan. After winning the 2015 German junior national title, they were sent to the 2015 World Junior Championships in Tallinn, Estonia; ranked 13th in the short dance, they qualified for the final segment and finished 12th overall.

Competing in the Challenger Series (CS), Müller/Dieck finished tenth in September at the 2015 Nebelhorn Trophy – their first senior international – and eighth the following month at the 2015 Mordovian Ornament. In November, they won bronze at the 2015 NRW Trophy before appearing at their third CS event, the 2015 Tallinn Trophy, where they placed fifth. They were awarded the silver medal at the German Championships in December, having finished second to Kavita Lorenz / Panagiotis Polizoakis, and took bronze at the Toruń Cup. Müller/Dieck were included in Germany's team to the 2016 European Championships in Bratislava, Slovakia, but were eliminated after placing 23rd in the short dance.[7]

In spring 2016, Müller/Dieck began training under Marina Zueva in Canton, Michigan, in addition to Schulz and Young in Dortmund.[2]