Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/08/03 18:30 | Zengyi Wang v Hannes Hormann | L | 3-1 |
| Challenger Series TT | 2023/08/03 15:50 | Anton Limonov v Hannes Hormann | W | 0-3 |
| Challenger Series TT | 2023/08/03 13:50 | Bohdan Sinkevych v Hannes Hormann | W | 2-3 |
| Challenger Series TT | 2023/08/03 09:50 | Marco Stefanidis v Hannes Hormann | W | 2-3 |
| Challenger Series TT | 2023/08/03 07:10 | Daniel Rinderer v Hannes Hormann | L | 3-1 |
| Challenger Series TT | 2023/07/25 09:50 | Ihor Zavadskyi v Hannes Hormann | W | 1-3 |
| Challenger Series TT | 2023/07/25 08:30 | Hannes Hormann v Bohdan Sinkevych | L | 2-3 |
| Challenger Series TT | 2023/07/24 18:30 | Guillaume Alcayde v Hannes Hormann | L | 3-1 |
| Challenger Series TT | 2023/08/04 07:10 | Bohdan Sinkevych v Karl Zimmermann | L | 3-1 |
| Challenger Series TT | 2023/08/03 17:10 | Marco Stefanidis v Karl Zimmermann | W | 2-3 |
| Challenger Series TT | 2023/08/03 15:10 | Zengyi Wang v Karl Zimmermann | L | 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 |