Stadium: Centre Court Round: 26 Ground: Clay
| ITF Germany F8 | 2017/07/22 11:10 | Jeremy Jahn v Jan Choinski | 5-7,2-6 |
| Challenger Ludwigshafen | 2019/07/01 14:45 | Daniel Altmaier v Jan Choinski | 6-4,7-6 |
| Wimbledon | 2019/06/24 10:00 | James Duckworth v Jan Choinski | 6-1,7-5 |
| Challenger Ilkley | 2019/06/18 13:20 | Jan Choinski v Brydan Klein | 6-2,5-7,2-6 |
| Challenger Murcia | 2019/04/10 09:00 | Jan Choinski v Mikael Ymer | 2-6,4-6 |
| Challenger Murcia | 2019/04/09 09:00 | David Vega Hernandez v Jan Choinski | 3-6,3-6 |
| Challenger Lille | 2019/03/22 13:45 | Jan Choinski v Yannick Maden | 3-6,3-6 |
| Challenger Lille | 2019/03/21 10:50 | Rayane Roumane v Jan Choinski | 6-4,4-6,6-7 |
| Challenger Lille | 2019/03/19 10:20 | Jan Choinski v Yannick Hanfmann | 6-0,6-4 |
| ITF M25 Lasne | 2019/07/05 13:00 | Zizou Bergs v Jeremy Jahn | 6-4,2-6,6-7 |
| ITF M25 Lasne | 2019/07/04 09:40 | Vasile Antonescu v Jeremy Jahn | 2-6,3-6 |
| ITF M25 Lasne | 2019/07/03 17:30 | Simon Beaupain v Jeremy Jahn | 1-6,1-6 |
| ITF M25 Arlon | 2019/06/26 08:00 | Sandro Ehrat v Jeremy Jahn | 6-4,6-1 |
| Challenger Bratislava | 2019/06/19 14:50 | Jeremy Jahn v Andrej Martin | 7-6,2-6,2-6 |
| Challenger Bratislava | 2019/06/17 15:20 | Jeremy Jahn v Tobias Simon | 6-4,6-7,6-1 |
| ITF M25 Karlsruhe | 2019/06/05 13:40 | Jeremy Jahn v James Frawley | 6-2,3-6,7-6 |
| ITF M15 Quinta Do Lago | 2019/03/20 15:55 | Jonathan Binding v Jeremy Jahn | 2-6,1-6 |