Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2022/11/21 14:50 | Sven Happek v Felix Kohler | L | 3-2 |
| Challenger Series TT | 2023/03/13 13:30 | Felix Kohler v Makoto Nogami | W | 3-2 |
| Challenger Series TT | 2023/03/13 10:10 | Michael Engelhardt v Felix Kohler | L | 3-1 |
| Challenger Series TT | 2023/03/13 08:10 | Felix Kohler v Peter Hribar | L | 0-3 |
| Challenger Series TT | 2022/11/22 09:30 | Rafael Turrini v Felix Kohler | L | 3-0 |
| Challenger Series TT | 2022/11/21 19:30 | Felix Kleeberg v Felix Kohler | W | 1-3 |
| Challenger Series TT | 2022/11/21 16:50 | Florian Bluhm v Felix Kohler | L | 3-0 |
| Challenger Series TT | 2022/11/21 14:50 | Sven Happek v Felix Kohler | L | 3-2 |
| Challenger Series TT | 2022/11/21 10:50 | Salim Karam v Felix Kohler | W | 0-3 |
| Challenger Series TT | 2023/03/13 12:50 | Michael Engelhardt v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/03/13 10:50 | Sven Happek v Peter Hribar | L | 0-3 |
| Challenger Series TT | 2023/03/13 08:50 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/03/07 11:30 | Rodrigo Hidalgo v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/03/07 07:30 | Aljaz Godec v Sven Happek | W | 0-3 |
| Challenger Series TT | 2023/03/06 19:30 | Sven Happek v Dennis Klein | L | 1-3 |
| Challenger Series TT | 2023/03/06 16:10 | Sven Happek v Peter Hribar | L | 1-3 |
| Challenger Series TT | 2023/03/06 14:10 | Dauud Cheaib v Sven Happek | L | 3-0 |