Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/06/22 18:30 | Ihor Zavadskyi v Samuel Amann | W | 1-3 |
| Challenger Series TT | 2023/06/22 15:50 | Dauud Cheaib v Samuel Amann | L | 3-1 |
| Challenger Series TT | 2023/06/22 13:50 | Carlo Rossi v Samuel Amann | L | 3-0 |
| Challenger Series TT | 2023/06/22 09:50 | Sven Happek v Samuel Amann | L | 3-0 |
| Challenger Series TT | 2023/06/22 07:10 | Dennis Klein v Samuel Amann | L | 3-0 |
| Challenger Series TT | 2023/04/11 07:50 | Bohdan Sinkevych v Samuel Amann | L | 3-0 |
| Challenger Series TT | 2023/04/10 19:50 | Peter Hribar v Samuel Amann | L | 3-0 |
| Challenger Series TT | 2023/04/10 17:50 | Alvaro Gainza v Samuel Amann | L | 3-2 |
| 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 | 2023/06/22 11:10 | Dauud Cheaib v Johannes Willeke | L | 3-0 |
| Challenger Series TT | 2023/06/22 06:30 | Tobias Slanina v Johannes Willeke | L | 3-2 |
| Challenger Series TT | 2023/06/20 08:30 | Jose Guillot v Johannes Willeke | L | 3-1 |
| Challenger Series TT | 2023/06/20 07:10 | Aljaz Godec v Johannes Willeke | L | 3-0 |