| Challenger Ochsenhausen | 2021/05/24 18:00 | Henning Zeptner v Dennis Klein | L | 0-3 |
| Challenger Ochsenhausen | 2021/06/28 19:20 | Josip Huzjak v Henning Zeptner | L | 3-2 |
| Challenger Ochsenhausen | 2021/06/28 16:40 | Semenov, Andrey v Henning Zeptner | L | 3-2 |
| Challenger Ochsenhausen | 2021/06/28 14:40 | Valuch, Alexander v Henning Zeptner | L | 3-1 |
| Challenger Ochsenhausen | 2021/06/28 09:50 | Dauud Cheaib v Henning Zeptner | L | 3-1 |
| Challenger Ochsenhausen | 2021/06/28 07:10 | Ligocki, Christopher v Henning Zeptner | W | 2-3 |
| Challenger Ochsenhausen | 2021/06/18 10:30 | Henning Zeptner v Dauud Cheaib | L | 0-3 |
| Challenger Ochsenhausen | 2021/06/18 07:50 | Henning Zeptner v Kuzmin, Fedor | L | 1-3 |
| Challenger Ochsenhausen | 2021/06/17 11:50 | Henning Zeptner v Harmeet Desai | L | 0-3 |
| Challenger Ochsenhausen | 2021/06/29 08:20 | Valuch, Alexander v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2021/06/28 18:00 | Dauud Cheaib v Dennis Klein | W | 1-3 |
| Challenger Ochsenhausen | 2021/06/28 16:00 | Josip Huzjak v Dennis Klein | W | 1-3 |
| Challenger Ochsenhausen | 2021/06/28 12:30 | Ligocki, Christopher v Dennis Klein | W | 1-3 |
| Challenger Ochsenhausen | 2021/06/28 11:10 | Semenov, Andrey v Dennis Klein | W | 1-3 |
| Challenger Ochsenhausen | 2021/06/28 06:30 | Liang Qiu v Dennis Klein | W | 2-3 |
| Challenger Ochsenhausen | 2021/06/11 13:30 | Carlos Muhlbach v Dennis Klein | L | 3-2 |
| Challenger Ochsenhausen | 2021/06/11 12:05 | Dennis Klein v Chamorro, Miguel | W | 3-0 |