| Challenger Series TT | 2023/03/27 14:30 | Makoto Nogami v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/02/09 07:30 | Makoto Nogami v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/04/06 14:30 | Kirill Fadeev v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/04/06 11:50 | Damian Zech v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/04/06 09:50 | Dennis Klein v Dimitrije Levajac | L | 0-3 |
| Challenger Series TT | 2023/04/06 07:50 | Dennis Klein v Yonghun Lee | W | 3-1 |
| Challenger Series TT | 2023/04/04 12:10 | Dennis Klein v Amirreza Abbasi | W | 3-2 |
| Challenger Series TT | 2023/04/04 10:05 | Dennis Klein v Kirill Fadeev | W | 3-0 |
| Challenger Series TT | 2023/04/04 09:10 | Dennis Klein v Emiliano Riofrio | W | 3-0 |
| Challenger Series TT | 2023/04/04 07:10 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Series TT | 2023/04/06 15:10 | Yonghun Lee v Makoto Nogami | L | 3-0 |
| Challenger Series TT | 2023/04/06 12:30 | Kirill Fadeev v Makoto Nogami | L | 3-2 |
| Challenger Series TT | 2023/04/06 11:10 | Florian Bourrassaud v Makoto Nogami | L | 3-1 |
| Challenger Series TT | 2023/04/06 06:30 | Damian Zech v Makoto Nogami | W | 1-3 |
| Challenger Series TT | 2023/03/28 09:50 | Makoto Nogami v Bohdan Sinkevych | W | 3-2 |
| Challenger Series TT | 2023/03/27 18:30 | Makoto Nogami v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/03/27 14:30 | Makoto Nogami v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/03/27 12:30 | Makoto Nogami v Jeromy Loffler | L | 1-3 |