Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/01/12 13:30 | Sven Happek v Makoto Nogami | W | 3-0 |
| Challenger Series TT | 2022/12/12 17:30 | Makoto Nogami v Sven Happek | W | 0-3 |
| Challenger Ochsenhausen | 2022/07/18 09:50 | Sven Happek v Makoto Nogami | L | 1-3 |
| Challenger Series TT | 2023/03/13 15:30 | Felix Kohler v Sven Happek | W | 1-3 |
| 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 | 2023/03/13 16:10 | Dauud Cheaib v Makoto Nogami | L | 3-2 |
| Challenger Series TT | 2023/03/13 13:30 | Felix Kohler v Makoto Nogami | L | 3-2 |
| Challenger Series TT | 2023/03/13 12:10 | Anton Limonov v Makoto Nogami | L | 3-0 |
| Challenger Series TT | 2023/03/13 07:30 | Michael Engelhardt v Makoto Nogami | L | 3-0 |
| Challenger Series TT | 2023/02/10 10:50 | Makoto Nogami v Bohdan Sinkevych | W | 3-1 |
| Challenger Series TT | 2023/02/10 07:30 | Makoto Nogami v Alberto Mino | L | 0-3 |
| Challenger Series TT | 2023/02/09 18:50 | Makoto Nogami v Sourav Saha | L | 0-3 |
| Challenger Series TT | 2023/02/09 17:30 | Makoto Nogami v Bastien Dupont | L | 1-3 |