stadio: Schoonderbeekbouw Court Round: 19 Ground: Clay
| Challenger Amersfoort | 2021/07/11 11:40 | Jeremy Jahn v Arjun Kadhe | 6-2,6-7,6-4 |
| ITF M25 Marburg | 2021/07/06 16:40 | Alexander Donski v Jeremy Jahn | 6-2,6-2 |
| ITF M25 L'Aia | 2021/06/29 09:00 | Jeremy Jahn v Javier Barranco Cosano | 2-6,3-6 |
| ITF M25 Alkmaar | 2021/06/23 10:55 | Marvin Moeller v Jeremy Jahn | 6-2,6-0 |
| DTB German Pro Series | 2020/06/12 08:30 | Jeremy Jahn v Nino Ehrenschneider | 4-6,1-6 |
| DTB German Pro Series | 2020/06/11 08:00 | Jeremy Jahn v Marvin Moeller | 6-3,0-6,3-6 |
| ITF M25 Sunderland | 2020/02/26 13:00 | Jeremy Jahn v Jonathan Mridha | 3-6,3-6 |
| Challenger Campinas | 2019/10/01 16:20 | Nicolas Alvarez v Jeremy Jahn | 6-4,6-2 |
| Challenger Amersfoort | 2021/07/11 14:00 | Dominik Palan v Johan Nikles | 4-6,6-7 |
| ITF M25 L'Aia | 2021/07/03 08:00 | Javier Barranco Cosano v Johan Nikles | 7-5,6-4 |
| ITF M25 L'Aia | 2021/07/02 10:30 | Mateus Alves v Johan Nikles | 2-6,6-7 |
| ITF M25 L'Aia | 2021/07/01 10:50 | Johan Nikles v Julian Ocleppo | 6-4,6-1 |
| ITF M25 Klosters | 2021/06/23 09:25 | Johan Nikles v Mohamed Aziz Dougaz | 2-6,7-6,3-6 |
| ITF M15 Genova | 2021/06/20 08:00 | Johan Nikles v Luca Nardi | 4-6,2-6 |
| ITF M15 Genova | 2021/06/19 15:00 | Edoardo Eremin v Johan Nikles | 2-6,3-6 |
| ITF M15 Genova | 2021/06/18 11:30 | Johan Nikles v Dragos Nicolae Madaras | 7-5,3-6,7-5 |