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 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 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.

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

In July, Choinski won his fourth Challenger title in Troyes, defeating Calvin Hemery in the final in three sets. His fifth Challenger title came just two weeks later when he defeated Kimmer Coppejans in the final at the Dutch Open.

In September, Choinski defeated Vít Kopřiva in the final at the Layjet Open in Austria to claim his third Challenger title of the year.

The following month at the Copa Faulcombridge in Valencia, Spain, he won his fourth Challenger title of the season and seventh overall, defeating Luka Mikrut in the final.