Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/08/03 13:10 | Anton Limonov v Zengyi Wang | L | 3-0 |
| Challenger Series TT | 2023/08/03 10:30 | Bohdan Sinkevych v Zengyi Wang | W | 1-3 |
| Challenger Series TT | 2023/08/03 07:50 | Marco Stefanidis v Zengyi Wang | W | 1-3 |
| Challenger Series TT | 2023/06/15 17:50 | Yannick Vostes v Zengyi Wang | L | 3-0 |
| Challenger Series TT | 2023/06/15 16:30 | Norbert Tauler v Zengyi Wang | W | 1-3 |
| Challenger Series TT | 2023/06/15 14:30 | Zengyi Wang v Liang Qiu | L | 0-3 |
| Challenger Series TT | 2023/06/15 12:30 | Zengyi Wang v Dauud Cheaib | W | 3-0 |
| Challenger Series TT | 2023/06/15 11:10 | Zengyi Wang v Jose Guillot | W | 3-1 |
| Challenger Series TT | 2023/08/03 12:30 | Daniel Rinderer v Karl Zimmermann | L | 3-1 |
| 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 |