| German Championship | 2020/12/07 15:00 | Neo Niedner v Walder, Jim | 2-6,6-4,6-7 |
| German Masters | 2020/08/14 07:00 | Slobodchikov, Ronald v Walder, Jim | 6-2,6-4 |
| German Premier League | 2020/08/13 12:40 | Walder, Jim v Filip Cristian Jianu | 4-6,4-6 |
| German Premier League | 2020/08/12 17:15 | Walder, Jim v Robert Strombachs | 6-7,2-6 |
| German Premier League | 2020/08/11 18:15 | Buvaysar Gadamauri v Walder, Jim | 6-3,6-7,6-3 |
| German Masters | 2020/08/07 14:40 | Walder, Jim v Benjamin Lock | 4-6,4-6 |
| German Masters | 2020/08/06 15:00 | Walder, Jim v Louis Wessels | 4-6,1-6 |
| ITF M15 Loule | 2020/03/08 14:00 | Blake Ellis v Walder, Jim | 3-6,6-4,10-8 |
| ITF M15 Alkmaar | 2020/08/28 14:30 | Geens, Clement v Benjamin Hassan | 7-5,7-5 |
| ITF M15 Alkmaar | 2020/08/27 13:30 | March, Antonio Cayetano v Benjamin Hassan | 5-7,1-6 |
| ITF M15 Alkmaar | 2020/08/25 14:30 | Schmitz, Constantin v Benjamin Hassan | 4-6,6-3,3-6 |
| Exo Tennis Germany Series | 2020/08/01 09:30 | Schmitz, Constantin v Benjamin Hassan | 6-7,7-6,0-6 |
| Exo Tennis Germany Series | 2020/07/31 09:30 | Daniel Vishnick v Benjamin Hassan | 1-6,1-6 |
| Exo Tennis Germany Series | 2020/07/30 10:30 | Gelhardt, Luca v Benjamin Hassan | 5-7,4-6 |
| Exo Tennis Germany Series | 2020/07/29 08:00 | Hazem Naw v Benjamin Hassan | 4-6,6-7 |
| Exo Tennis Germany Series | 2020/07/28 11:15 | Haerteis, Johannes v Benjamin Hassan | 4-6,2-6 |