Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/04/06 17:10 | Dennis Klein v Makoto Nogami | L | 3-1 |
| Challenger Series TT | 2023/03/27 14:30 | Makoto Nogami v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/02/09 07:30 | Makoto Nogami v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/05/04 09:10 | Makoto Nogami v Damian Zech | W | 3-2 |
| Challenger Series TT | 2023/05/04 06:30 | Makoto Nogami v Kirill Fadeev | L | 1-3 |
| Challenger Series TT | 2023/04/18 08:30 | Dillon Chambers v Makoto Nogami | L | 3-2 |
| Challenger Series TT | 2023/04/18 07:10 | Simon Berglund v Makoto Nogami | L | 3-1 |
| Challenger Series TT | 2023/04/17 17:10 | Sven Happek v Makoto Nogami | W | 1-3 |
| Challenger Series TT | 2023/04/17 15:10 | Siddharta Almeida v Makoto Nogami | W | 2-3 |
| Challenger Series TT | 2023/04/17 12:30 | Damian Zech v Makoto Nogami | L | 3-2 |
| Challenger Series TT | 2023/04/17 11:10 | Dauud Cheaib v Makoto Nogami | L | 3-2 |
| Challenger Series TT | 2023/05/04 09:50 | Dennis Klein v Bohdan Sinkevych | W | 3-0 |
| Challenger Series TT | 2023/05/04 07:50 | Dennis Klein v Peter Hribar | W | 3-0 |
| Challenger Series TT | 2023/05/02 13:30 | Dennis Klein v Snehit Suravajjula | L | 0-3 |
| Challenger Series TT | 2023/05/02 11:25 | Dennis Klein v Kirill Fadeev | W | 3-0 |
| Challenger Series TT | 2023/05/02 09:50 | Dennis Klein v Benjamin Fruchart | W | 3-2 |
| Challenger Series TT | 2023/05/02 06:30 | Dennis Klein v Snehit Suravajjula | L | 2-3 |
| Challenger Series TT | 2023/05/01 17:50 | Dennis Klein v George Downing | W | 3-0 |
| Challenger Series TT | 2023/05/01 16:30 | Dennis Klein v Alexander Sverdlik | W | 3-0 |