| Challenger Series TT | 2022/12/05 15:30 | Damian Zech v Sven Happek | W | 3-2 |
| Challenger Series TT | 2022/12/01 08:50 | Sven Happek v Damian Zech | L | 3-0 |
| Challenger Series TT | 2022/09/19 19:50 | Damian Zech v Sven Happek | L | 0-3 |
| Challenger Ochsenhausen | 2022/06/27 13:50 | Sven Happek v Damian Zech | L | 3-1 |
| Challenger Ochsenhausen | 2022/06/20 17:10 | Damian Zech v Sven Happek | L | 2-3 |
| Challenger Ochsenhausen | 2022/01/20 18:10 | Sven Happek v Damian Zech | W | 2-3 |
| Challenger Ochsenhausen | 2021/12/13 15:40 | Sven Happek v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/01/12 07:30 | Damian Zech v Makoto Nogami | L | 1-3 |
| Challenger Series TT | 2022/12/06 11:30 | Damian Zech v Elia Schmid | L | 1-3 |
| Challenger Series TT | 2022/12/06 08:50 | Damian Zech v Salim Karam | W | 3-0 |
| Challenger Series TT | 2022/12/05 20:10 | Damian Zech v John Oyebode | L | 1-3 |
| Challenger Series TT | 2022/12/05 15:30 | Damian Zech v Sven Happek | W | 3-2 |
| Challenger Series TT | 2022/12/05 13:30 | Damian Zech v Amirreza Abbasi | L | 0-3 |
| Challenger Series TT | 2022/12/05 10:10 | Florian Bluhm v Damian Zech | L | 3-1 |
| Challenger Series TT | 2022/12/05 08:10 | Damian Zech v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/01/12 08:10 | Sven Happek v Jean Rassouw | W | 3-0 |
| Challenger Series TT | 2023/01/10 08:50 | Yongyin Li v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/01/09 20:50 | Kestutis Zeimys v Sven Happek | W | 2-3 |
| Challenger Series TT | 2023/01/09 18:50 | Yannick Vostes v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/01/09 16:50 | Sven Happek v Jean Rassouw | W | 3-1 |
| Challenger Series TT | 2023/01/09 14:10 | Sven Happek v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/01/09 12:10 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/01/09 09:30 | Daniel Rinderer v Sven Happek | L | 3-2 |