| Challenger Series TT | 2023/05/22 09:50 | Sven Happek v Damian Zech | W | 0-3 |
| Challenger Series TT | 2023/04/20 11:50 | Sven Happek v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/04/17 14:30 | Damian Zech v Sven Happek | L | 0-3 |
| Challenger Series TT | 2023/01/12 10:10 | Damian Zech v Sven Happek | L | 1-3 |
| 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 Series TT | 2023/06/26 07:50 | Damian Zech v Benjamin Fruchart | L | 0-3 |
| Challenger Series TT | 2023/05/23 09:50 | Jeromy Loffler v Damian Zech | L | 3-1 |
| Challenger Series TT | 2023/05/23 08:30 | Damian Zech v Kirill Fadeev | L | 0-3 |
| Challenger Series TT | 2023/05/22 18:30 | Louis Price v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/05/22 15:50 | Aljaz Godec v Damian Zech | W | 0-3 |
| Challenger Series TT | 2023/05/22 13:50 | Albert Vilardell v Damian Zech | L | 3-0 |
| Challenger Series TT | 2023/05/22 09:50 | Sven Happek v Damian Zech | W | 0-3 |
| Challenger Series TT | 2023/05/22 07:10 | Michael Engelhardt v Damian Zech | L | 3-1 |
| Challenger Series TT | 2023/06/26 07:10 | Makoto Nogami v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/06/23 09:10 | Sven Happek v Carlo Rossi | L | 2-3 |
| Challenger Series TT | 2023/06/22 19:50 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/06/22 17:10 | Sven Happek v Johannes Willeke | L | 2-3 |
| Challenger Series TT | 2023/06/22 14:30 | Dennis Klein v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/06/22 11:50 | Tobias Slanina v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/06/22 09:50 | Sven Happek v Samuel Amann | W | 3-0 |
| Challenger Series TT | 2023/06/22 07:50 | Sven Happek v Ihor Zavadskyi | L | 1-3 |