Stadium: Ochsenhausen, Germany
| Challenger Ochsenhausen | 2021/05/11 12:35 | Carlo Rossi v Dennis Klein | W | 2-3 |
| Challenger Ochsenhausen | 2021/05/10 17:20 | Dennis Klein v Carlo Rossi | L | 0-3 |
| Challenger Series TT | 2023/06/19 17:50 | Dennis Klein v Akito Itagaki | W | 3-0 |
| Challenger Series TT | 2023/06/19 16:30 | Dennis Klein v Aljaz Godec | W | 3-0 |
| Challenger Series TT | 2023/06/19 11:50 | Dennis Klein v Marco Stefanidis | W | 3-0 |
| Challenger Series TT | 2023/06/19 09:10 | Dennis Klein v Sven Happek | W | 3-1 |
| Challenger Series TT | 2023/06/19 06:30 | Dennis Klein v Johannes Willeke | W | 3-0 |
| Challenger Series TT | 2023/05/09 12:50 | Humberto Manhani v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/05/09 12:05 | Amirreza Abbasi v Dennis Klein | L | 3-1 |
| Challenger Series TT | 2023/05/09 08:30 | Amirreza Abbasi v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/06/19 18:30 | Carlo Rossi v Jose Guillot | L | 2-3 |
| Challenger Series TT | 2023/06/19 15:10 | Carlo Rossi v Johannes Willeke | W | 3-0 |
| Challenger Series TT | 2023/06/19 13:10 | Akito Itagaki v Carlo Rossi | W | 0-3 |
| Challenger Series TT | 2023/06/19 10:30 | Aljaz Godec v Carlo Rossi | W | 1-3 |
| Challenger Series TT | 2023/06/19 07:50 | Marco Stefanidis v Carlo Rossi | W | 1-3 |
| WTT Contender Lagos Quals | 2023/06/12 14:00 | Vincent Picard v Carlo Rossi | L | 3-0 |
| Challenger Series TT | 2023/05/30 11:30 | Anton Limonov v Carlo Rossi | L | 3-0 |
| Challenger Series TT | 2023/05/30 10:45 | Ryoichi Yoshiyama v Carlo Rossi | L | 3-1 |