| Challenger Series TT | 2023/05/09 08:30 | Amirreza Abbasi v Dennis Klein | L | 1-3 |
| Challenger Series TT | 2023/04/04 12:10 | Dennis Klein v Amirreza Abbasi | L | 3-2 |
| Challenger Series TT | 2023/04/03 07:10 | Dennis Klein v Amirreza Abbasi | L | 3-2 |
| Challenger Series TT | 2022/09/02 13:30 | Dennis Klein v Amirreza Abbasi | L | 3-1 |
| Challenger Series TT | 2022/09/01 16:30 | Dennis Klein v Amirreza Abbasi | L | 3-1 |
| Challenger Ochsenhausen | 2022/06/24 13:05 | Amirreza Abbasi v Dennis Klein | L | 1-3 |
| Challenger Ochsenhausen | 2022/06/23 11:50 | Dennis Klein v Amirreza Abbasi | W | 1-3 |
| Challenger Series TT | 2022/06/17 12:50 | Dennis Klein v Amirreza Abbasi | W | 2-3 |
| Challenger Series TT | 2023/05/09 09:50 | Tobias Slanina v Amirreza Abbasi | W | 0-3 |
| Challenger Series TT | 2023/05/09 08:30 | Amirreza Abbasi v Dennis Klein | L | 1-3 |
| Challenger Series TT | 2023/05/08 18:30 | Anton Limonov v Amirreza Abbasi | W | 1-3 |
| Challenger Series TT | 2023/05/08 15:50 | Antonin Gavlas v Amirreza Abbasi | L | 3-2 |
| Challenger Series TT | 2023/05/08 13:50 | Humberto Manhani v Amirreza Abbasi | W | 0-3 |
| Challenger Series TT | 2023/05/08 09:50 | Sven Happek v Amirreza Abbasi | W | 1-3 |
| Challenger Series TT | 2023/05/08 07:10 | Anton Andersson v Amirreza Abbasi | W | 1-3 |
| TT Star Series | 2023/04/27 10:15 | Amirreza Abbasi v Elias Ranefur | L | 1-3 |
| Challenger Series TT | 2023/05/09 08:30 | Amirreza Abbasi v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/05/09 07:10 | Humberto Manhani v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/05/08 17:10 | Sven Happek v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/05/08 15:10 | Anton Limonov v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/05/08 12:30 | Anton Andersson v Dennis Klein | L | 3-1 |
| Challenger Series TT | 2023/05/08 11:10 | Antonin Gavlas v Dennis Klein | L | 3-0 |
| Challenger Series TT | 2023/05/08 06:30 | Tobias Slanina v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/05/05 13:30 | Dennis Klein v Benjamin Fruchart | W | 3-1 |