Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/07/06 11:50 | Johannes Willeke v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/07/06 09:10 | Johannes Willeke v Hannes Hormann | L | 2-3 |
| Challenger Series TT | 2023/07/06 06:30 | Johannes Willeke v Liang Qiu | W | 3-2 |
| Challenger Series TT | 2023/06/23 08:30 | Samuel Amann v Johannes Willeke | W | 0-3 |
| Challenger Series TT | 2023/06/23 07:10 | Carlo Rossi v Johannes Willeke | L | 3-0 |
| Challenger Series TT | 2023/06/22 17:10 | Sven Happek v Johannes Willeke | W | 2-3 |
| Challenger Series TT | 2023/06/22 15:10 | Ihor Zavadskyi v Johannes Willeke | L | 3-1 |
| Challenger Series TT | 2023/06/22 12:30 | Dennis Klein v Johannes Willeke | L | 3-0 |
| Challenger Series TT | 2023/07/06 13:50 | Mathias Golab v David Reitspies | L | 0-3 |
| Challenger Series TT | 2023/07/06 10:30 | Mathias Golab v Dauud Cheaib | L | 1-3 |
| Challenger Series TT | 2023/07/06 08:30 | Mathias Golab v Benjamin Fruchart | L | 1-3 |
| Challenger Series TT | 2023/07/04 09:10 | Dennis Klein v Mathias Golab | L | 3-0 |
| Challenger Series TT | 2023/07/04 07:10 | Mathias Golab v Daniel Rinderer | L | 1-3 |
| Challenger Series TT | 2023/07/03 19:10 | Tobias Slanina v Mathias Golab | L | 3-2 |
| Challenger Series TT | 2023/07/03 16:30 | Kirill Fadeev v Mathias Golab | L | 3-0 |
| Challenger Series TT | 2023/07/03 13:50 | Mathias Golab v Akito Itagaki | L | 1-3 |