Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/08/03 09:10 | Damian Zech v Daniel Rinderer | W | 2-3 |
| Challenger Series TT | 2023/08/03 07:10 | Daniel Rinderer v Hannes Hormann | W | 3-1 |
| Challenger Series TT | 2023/07/28 12:10 | Daniel Rinderer v Yoan Rebetez | W | 3-0 |
| Challenger Series TT | 2023/07/28 10:45 | Antonin Gavlas v Daniel Rinderer | L | 3-0 |
| Challenger Series TT | 2023/07/28 09:50 | Daniel Rinderer v Guillaume Alcayde | W | 3-2 |
| Challenger Series TT | 2023/07/28 07:50 | Daniel Rinderer v Dauud Cheaib | L | 1-3 |
| Challenger Series TT | 2023/07/27 17:50 | Daniel Rinderer v Yoan Rebetez | L | 1-3 |
| Challenger Series TT | 2023/07/27 12:30 | Daniel Rinderer v Damian Zech | W | 3-0 |
| Challenger Series TT | 2023/08/03 11:10 | Anton Limonov v Karl Zimmermann | L | 3-0 |
| Challenger Series TT | 2023/08/03 06:30 | Damian Zech v Karl Zimmermann | W | 1-3 |
| Challenger Series TT | 2023/05/30 09:10 | Simon Berglund v Karl Zimmermann | L | 3-0 |
| Challenger Series TT | 2023/05/30 06:30 | Anton Limonov v Karl Zimmermann | L | 3-0 |
| Challenger Series TT | 2023/05/29 17:10 | Karl Zimmermann v Ryoichi Yoshiyama | L | 2-3 |
| Challenger Series TT | 2023/05/29 13:10 | Peter Hribar v Karl Zimmermann | L | 3-0 |
| Challenger Series TT | 2023/05/29 10:30 | Dauud Cheaib v Karl Zimmermann | L | 3-0 |
| Challenger Series TT | 2023/05/29 07:50 | Carlo Rossi v Karl Zimmermann | L | 3-0 |