Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/01/24 07:30 | Sven Happek v Enio Mendes | L | 0-3 |
| Challenger Ochsenhausen | 2018/11/28 12:10 | Enio Mendes v Sven Happek | L | 3-0 |
| Challenger Ochsenhausen | 2017/10/18 10:30 | Sven Happek v Enio Mendes | L | 0-3 |
| Challenger Ochsenhausen | 2017/07/13 10:30 | Sven Happek v Enio Mendes | L | 1-3 |
| 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 |
| Challenger Series TT | 2023/06/20 12:50 | Jose Guillot v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/06/20 12:05 | Carlo Rossi v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/06/16 12:10 | Liang Qiu v Enio Mendes | W | 0-3 |
| Challenger Series TT | 2023/06/16 10:45 | Enio Mendes v Norbert Tauler | W | 3-2 |
| Challenger Series TT | 2023/06/16 08:30 | Yannick Vostes v Enio Mendes | L | 3-2 |
| Challenger Series TT | 2023/06/16 07:10 | Enio Mendes v Jose Guillot | W | 3-0 |
| Challenger Series TT | 2023/06/15 15:10 | Norbert Tauler v Enio Mendes | L | 3-2 |
| Challenger Series TT | 2023/06/15 13:10 | Enio Mendes v Liang Qiu | W | 3-2 |
| Challenger Series TT | 2023/06/15 10:30 | Enio Mendes v Dauud Cheaib | W | 3-2 |
| Challenger Series TT | 2023/06/15 08:30 | Enio Mendes v Zengyi Wang | W | 3-2 |