Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/07/10 14:30 | Damian Zech v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/05/04 14:30 | Damian Zech v Dennis Klein | L | 1-3 |
| 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 Series TT | 2023/12/18 15:30 | Liang Qiu v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/12/18 12:50 | Daniel Rinderer v Damian Zech | L | 3-1 |
| Challenger Series TT | 2023/12/18 10:50 | Damian Zech v Akito Itagaki | L | 0-3 |
| Challenger Series TT | 2023/12/18 08:50 | Damian Zech v Benjamin Fruchart | L | 0-3 |
| Challenger Series TT | 2023/12/05 08:50 | Alexander Valuch v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/12/04 20:50 | Dauud Cheaib v Damian Zech | L | 3-1 |
| Challenger Series TT | 2023/12/04 18:50 | Carlo Rossi v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/12/04 16:50 | Damian Zech v Akito Itagaki | L | 1-3 |
| Challenger Series TT | 2023/12/18 16:10 | Benjamin Fruchart v Dennis Klein | L | 3-2 |
| Challenger Series TT | 2023/12/18 13:30 | Liang Qiu v Dennis Klein | L | 3-1 |
| Challenger Series TT | 2023/12/18 12:10 | Damien Llorca v Dennis Klein | L | 3-2 |
| Challenger Series TT | 2023/12/18 07:30 | Daniel Rinderer v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/12/12 14:30 | Dennis Klein v Lichen Wang | L | 0-3 |
| Challenger Series TT | 2023/12/12 12:25 | Dennis Klein v Liang Qiu | W | 3-1 |
| Challenger Series TT | 2023/12/12 10:50 | Dennis Klein v Kirill Fadeev | W | 3-2 |
| Challenger Series TT | 2023/12/12 07:30 | Dennis Klein v Bohdan Sinkevych | W | 3-1 |