Jan Choinski

Choinski reached the semifinals of the 2014 US Open – Boys' singles. He peaked at No. 17 combined world ranking, compiling a 78–30 match record in singles.

Choinski made his ATP main draw debut at the 2016 MercedesCup, where he was given a wildcard in singles.

Ranked No. 457, he reached his second Challenger final at the 2022 Campeonato Internacional de Tênis de Campinas being the first qualifier in the history of the tournament to do so. He won his maiden Challenger title defeating Juan Pablo Varillas, moving more than a 150 positions back up close to the top 300 at No. 301 on 10 October 2022. He reached the top 250 on 19 December 2022.

Choinski was awarded a wildcard for his Grand Slam main draw debut at the 2023 Wimbledon Championships where he won his first Major match against Dusan Lajovic before losing in the second round to 17th seed Hubert Hurkacz.

Ranked No. 188 he qualified for the 2024 Estoril Open and defeated wildcard João Fonseca.

For a second consecutive year, he received a wildcard for the Wimbledon but lost in the first round to Luciano Darderi in five sets.

He won the Elesse Pro Tennis Challenge in Wyomissing, Berks County, Pennsylvania, defeating No. 220 ranked Canadian Alexis Galarneau.

Ranked No. 280, he qualified for the main draw of the 2024 US Open after saving three match points against American Maxime Cressy to make his debut at this Major. Choinski lost in the first round to Roberto Carballés Baena in five sets. Following lifting the trophy at the Tulln Challenger, he returned to the top 200 in the ATP rankings, moving 100 positions up, on 9 September 2024.

In September, Choinski won his third career Challenger title at the 2024 NÖ Open in Tulln, Austria, defeating Lukas Neumayer in the final.