| Challenger Ochsenhausen | 2021/12/13 21:00 | Dennis Klein v Sven Happek | W | 3-0 |
| Challenger Ochsenhausen | 2021/12/01 12:50 | Sven Happek v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2021/07/14 06:30 | Sven Happek v Dennis Klein | L | 3-2 |
| Challenger Ochsenhausen | 2021/02/24 12:50 | Sven Happek v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2021/01/29 10:50 | Sven Happek v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2022/05/12 09:10 | Sudhanshu Grover v Dennis Klein | L | 3-0 |
| Challenger Ochsenhausen | 2022/05/12 07:10 | Dennis Klein v Kirill Fadeev | W | 3-0 |
| Challenger Ochsenhausen | 2022/03/24 18:50 | Dennis Klein v Sushmit Sriram | L | 2-3 |
| Challenger Ochsenhausen | 2022/03/24 17:30 | Dennis Klein v Dillon Chambers | W | 3-1 |
| Challenger Ochsenhausen | 2022/03/24 12:50 | Dennis Klein v Josip Huzjak | W | 3-0 |
| Challenger Ochsenhausen | 2022/03/24 10:10 | Dennis Klein v Simon Berglund | W | 3-1 |
| Challenger Ochsenhausen | 2022/03/24 07:30 | Dennis Klein v Kirill Fadeev | W | 3-2 |
| Challenger Ochsenhausen | 2022/03/22 14:30 | Elias Ranefur v Dennis Klein | L | 3-1 |
| Challenger Ochsenhausen | 2022/05/12 11:10 | Dillon Chambers v Sven Happek | L | 3-0 |
| Challenger Ochsenhausen | 2022/05/12 06:30 | Sudhanshu Grover v Sven Happek | L | 3-1 |
| Challenger Series TT | 2022/02/25 07:30 | Sven Happek v Josip Huzjak | W | 3-2 |
| Challenger Series TT | 2022/02/24 18:50 | Sven Happek v Dillon Chambers | L | 1-3 |
| Challenger Ochsenhausen | 2022/02/24 17:30 | Sven Happek v Alexander Valuch | L | 0-3 |
| Challenger Series TT | 2022/02/24 12:50 | Sven Happek v Amirreza Abbasi | L | 1-3 |
| Challenger Series TT | 2022/02/24 10:10 | Sven Happek v Matteo Mutti | L | 1-3 |
| Challenger Series TT | 2022/02/24 07:30 | Sven Happek v Daniel Rinderer | L | 1-3 |