| Challenger de Ochsenhausen | 2020/07/07 09:40 | Valerij Rakov v Sven Happek | W | 2-3 |
| Challenger de Ochsenhausen | 2020/02/03 19:40 | Sven Happek v Valerij Rakov | L | 1-3 |
| Challenger de Ochsenhausen | 2019/10/21 14:00 | Sven Happek v Valerij Rakov | W | 3-2 |
| Challenger de Ochsenhausen | 2019/07/08 09:10 | Sven Happek v Valerij Rakov | L | 1-3 |
| Challenger de Ochsenhausen | 2018/09/13 11:10 | Sven Happek v Valerij Rakov | L | 1-3 |
| Challenger de Ochsenhausen | 2018/05/10 06:30 | Sven Happek v Valerij Rakov | L | 0-3 |
| Challenger de Ochsenhausen | 2018/04/17 07:00 | Valerij Rakov v Sven Happek | L | 3-2 |
| Challenger de Ochsenhausen | 2018/03/26 10:30 | Valerij Rakov v Sven Happek | W | 2-3 |
| Challenger de Ochsenhausen | 2021/07/09 06:30 | Jeet Chandra v Sven Happek | L | 3-0 |
| Challenger de Ochsenhausen | 2021/07/08 10:30 | Fedor Kuzmin v Sven Happek | L | 3-0 |
| Challenger de Ochsenhausen | 2021/07/08 08:30 | Andriy Sitak v Sven Happek | L | 3-2 |
| Challenger de Ochsenhausen | 2021/07/07 13:10 | Sven Happek v Evgueni Chtchetinine | L | 2-3 |
| Challenger de Ochsenhausen | 2021/07/07 11:00 | Sven Happek v Snehit Suravajjula | L | 0-3 |
| Challenger de Ochsenhausen | 2021/07/07 09:45 | Sven Happek v Dwain Schwarzer | W | 3-2 |
| Challenger de Ochsenhausen | 2021/06/18 12:50 | Sven Happek v Harmeet Desai | L | 0-3 |
| Challenger de Ochsenhausen | 2021/06/18 11:25 | Dauud Cheaib v Sven Happek | L | 3-1 |
| Challenger de Ochsenhausen | 2021/07/08 12:30 | Evgueni Chtchetinine v Valerij Rakov | W | 1-3 |
| Challenger de Ochsenhausen | 2021/07/08 09:50 | Jeet Chandra v Valerij Rakov | L | 3-1 |
| Challenger de Ochsenhausen | 2021/07/08 07:50 | Snehit Suravajjula v Valerij Rakov | L | 3-0 |
| Challenger de Ochsenhausen | 2021/07/07 12:30 | Fedor Kuzmin v Valerij Rakov | L | 3-0 |
| Challenger de Ochsenhausen | 2021/07/07 11:25 | Dwain Schwarzer v Valerij Rakov | L | 3-2 |
| Challenger de Ochsenhausen | 2021/07/07 08:30 | Andriy Sitak v Valerij Rakov | W | 0-3 |
| Challenger de Ochsenhausen | 2021/06/01 11:40 | Valerij Rakov v Daniel Rinderer | L | 0-3 |
| Challenger de Ochsenhausen | 2021/06/01 09:00 | Valerij Rakov v Ahmed El-Mahdy | L | 2-3 |