| Challenger Amersfoort | 07/15 15:00 | 24 | [429] Ricardo Ojeda Lara v Jan Choinski [288] | 2-6,3-6 | |
| Challenger Ludwigshafen | 07/01 14:45 | 24 | [488] Daniel Altmaier v Jan Choinski [286] | 6-4,7-6 | |
| Wimbledon | 06/24 10:00 | 44 | [147] James Duckworth v Jan Choinski [284] | 6-1,7-5 | |
| Challenger Ilkley | 06/18 13:20 | 24 | [285] Jan Choinski v Brydan Klein [355] | 6-2,5-7,2-6 | |
| Challenger Bordeaux | 04/29 11:00 | 24 | [387] Andrea Pellegrino v Jan Choinski [285] | Retired | |
| Challenger Murcia | 04/10 09:00 | 25 | [280] Jan Choinski v Mikael Ymer [200] | 2-6,4-6 | |
| Challenger Murcia | 04/09 09:00 | 24 | [111] David Vega Hernandez v Jan Choinski [280] | 3-6,3-6 | |
| Challenger Lille | 03/22 13:45 | 27 | [265] Jan Choinski v Yannick Maden [108] | 3-6,3-6 | |
| Challenger Lille | 03/21 10:50 | 26 | Rayane Roumane v Jan Choinski | 6-4,4-6,6-7 | |
| Challenger Lille | 03/19 10:20 | 25 | [265] Jan Choinski v Yannick Hanfmann [160] | 6-0,6-4 | |
| Challenger Lille | 03/18 12:45 | 24 | [265] Jan Choinski v Filip Horansky [195] | 6-4,6-4 | |
| Challenger Pau | 02/28 14:05 | 26 | [153] Alexander Bublik v Jan Choinski [272] | 6-4,6-2 | |
| Challenger Pau | 02/26 20:35 | 25 | [272] Jan Choinski v Adam Pavlasek [223] | 6-4,7-5 | |
| Challenger Pau | 02/25 11:00 | 24 | [272] Jan Choinski v Sergio Gutierrez-Ferrol [216] | 7-5,2-6,6-3 | |
| Challenger Bergamo | 02/22 10:00 | 27 | [250] Roberto Marcora v Jan Choinski [284] | 7-6,6-3 | |
| Challenger Bergamo | 02/21 09:30 | 26 | [197] Jay Clarke v Jan Choinski [284] | 5-7,6-1,1-6 | |
| Challenger Bergamo | 02/19 18:40 | 25 | Jan Choinski v Federico Arnaboldi | 6-3,6-1 | |
| Challenger Bergamo | 02/19 16:40 | 25 | Jan Choinski v Stefano Travaglia | Cancelled | |
| Challenger Bergamo | 02/18 15:10 | 24 | [258] Benjamin Bonzi v Jan Choinski [284] | Retired | |
| Challenger Dallas | 02/05 21:45 | 25 | [98] Reilly Opelka v Jan Choinski [286] | 4-6,6-3,6-4 | |
| Challenger Dallas | 02/05 03:25 | 24 | Jan Choinski v Evan Zhu | 6-4,6-4 | |
| Challenger Cleveland | 01/29 23:35 | 25 | [289] Jan Choinski v Dustin Brown [233] | 6-7,6-1,6-7 | |
| Challenger Cleveland | 01/28 21:25 | 24 | [391] Tom Jomby v Jan Choinski [289] | Retired | |
| Challenger Newport Beach | 01/22 00:00 | 24 | [242] Christian Harrison v Jan Choinski [280] | 6-2,6-7,6-4 | |
| Challenger Columbus | 01/11 21:35 | 27 | [291] Jan Choinski v Jeffrey John Wolf [366] | 2-6,1-6 | |
| Challenger Columbus | 01/10 22:25 | 26 | [291] Jan Choinski v Laurynas Grigelis [283] | 7-6,4-6,6-2 | |
| Challenger Columbus | 01/08 17:30 | 25 | [264] Benjamin Bonzi v Jan Choinski [291] | 3-6,3-6 | |
| Challenger Columbus | 01/07 16:30 | 24 | [291] Jan Choinski v Alejandro Gonzalez [319] | 6-2,6-3 | |
| Challenger Orlando | 12/31 21:25 | 24 | Sam Riffice v Jan Choinski | 6-1,2-6,6-3 | |
| Challenger Knoxville | 11/04 15:00 | 45 | Jan Choinski v Ryan Shane | 6-3,1-6,6-7 |
Wikipedia - Jan Choinski
Jan Choinski (ur. 10 czerwca 1996 w Koblencji) – brytyjski tenisista reprezentujący do 2018 roku Niemcy.