Stadium: Ochsenhausen, Germany
| 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 | 2023/06/22 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 | 2023/06/30 12:50 | Liang Qiu v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/06/30 11:25 | Liang Qiu v Kirill Fadeev | L | 2-3 |
| Challenger Series TT | 2023/06/30 10:30 | Liang Qiu v Bohdan Sinkevych | W | 3-0 |
| Challenger Series TT | 2023/06/30 07:50 | Liang Qiu v Dauud Cheaib | L | 1-3 |
| Challenger Series TT | 2023/06/29 19:10 | Liang Qiu v Carlo Rossi | W | 3-1 |
| Challenger Series TT | 2023/06/29 14:30 | Liang Qiu v Anton Limonov | W | 3-2 |
| Challenger Series TT | 2023/06/29 12:30 | Liang Qiu v Felix Kohler | W | 3-1 |
| Challenger Series TT | 2023/06/29 09:10 | Jeromy Loffler v Liang Qiu | W | 1-3 |