Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/07/07 06:30 | Johannes Willeke v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/07/06 17:50 | Johannes Willeke v Benjamin Fruchart | L | 0-3 |
| Challenger Series TT | 2023/07/06 16:30 | Johannes Willeke v Mathias Golab | W | 3-0 |
| 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 | 2023/07/07 08:30 | David Reitspies v Liang Qiu | L | 1-3 |
| Challenger Series TT | 2023/07/06 18:30 | Dauud Cheaib v David Reitspies | W | 0-3 |
| Challenger Series TT | 2023/07/06 15:50 | Benjamin Fruchart v David Reitspies | W | 1-3 |
| Challenger Series TT | 2023/07/06 13:50 | Mathias Golab v David Reitspies | W | 0-3 |
| Challenger Series TT | 2023/07/06 09:50 | Dennis Klein v David Reitspies | L | 3-0 |
| Challenger Series TT | 2023/07/06 07:10 | Hannes Hormann v David Reitspies | W | 1-3 |
| Challenger Series TT | 2023/07/04 12:50 | Kirill Fadeev v David Reitspies | W | 2-3 |
| Challenger Series TT | 2023/07/04 12:05 | David Reitspies v Benjamin Fruchart | L | 1-3 |