Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/04/06 11:50 | Damian Zech v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/02/02 12:50 | Dennis Klein v Damian Zech | L | 3-0 |
| Challenger Series TT | 2022/10/06 12:30 | Damian Zech v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2022/08/08 11:50 | Dennis Klein v Damian Zech | L | 3-1 |
| Challenger Series TT | 2022/08/01 09:50 | Damian Zech v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2022/07/28 15:10 | Damian Zech v Dennis Klein | L | 0-3 |
| Challenger Ochsenhausen | 2022/06/20 07:50 | Damian Zech v Dennis Klein | L | 0-3 |
| Challenger Ochsenhausen | 2022/03/21 10:50 | Damian Zech v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/05/04 12:30 | Damian Zech v Kirill Fadeev | L | 1-3 |
| Challenger Series TT | 2023/05/04 09:10 | Makoto Nogami v Damian Zech | L | 3-2 |
| Challenger Series TT | 2023/05/04 07:10 | Damian Zech v Bohdan Sinkevych | W | 3-2 |
| Challenger Series TT | 2023/04/21 07:10 | Miguel Nunez v Damian Zech | L | 3-1 |
| Challenger Series TT | 2023/04/20 15:10 | Humberto Manhani v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/04/20 13:50 | Rafael Turrini v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/04/20 11:50 | Sven Happek v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/04/20 10:30 | Martin Andersen v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/05/04 11:50 | Makoto Nogami v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/05/04 09:50 | Dennis Klein v Bohdan Sinkevych | W | 3-0 |
| Challenger Series TT | 2023/05/04 07:50 | Dennis Klein v Peter Hribar | W | 3-0 |
| Challenger Series TT | 2023/05/02 13:30 | Dennis Klein v Snehit Suravajjula | L | 0-3 |
| Challenger Series TT | 2023/05/02 11:25 | Dennis Klein v Kirill Fadeev | W | 3-0 |
| Challenger Series TT | 2023/05/02 09:50 | Dennis Klein v Benjamin Fruchart | W | 3-2 |
| Challenger Series TT | 2023/05/02 06:30 | Dennis Klein v Snehit Suravajjula | L | 2-3 |
| Challenger Series TT | 2023/05/01 17:50 | Dennis Klein v George Downing | W | 3-0 |