| Challenger Ochsenhausen | 2021/01/25 16:20 | Dauud Cheaib v Dennis Klein | L | 3-2 |
| Challenger Ochsenhausen | 2021/01/25 12:50 | Liang Qiu v Dennis Klein | W | 1-3 |
| Challenger Ochsenhausen | 2021/01/25 10:50 | Dennis Klein v Juan Perez | W | 3-2 |
| Challenger Ochsenhausen | 2021/01/25 08:50 | Dennis Klein v Francisco Sanchi | W | 3-0 |
| Dusseldorf Masters | 2020/07/10 15:30 | Nils Hohmeier v Dennis Klein | L | 4-1 |
| Polish Open | 2020/03/11 13:00 | Dennis Klein v Marco Golla | W | 3-0 |
| German Open | 2020/01/28 09:15 | Dennis Klein v Daniel Gonzalez | W | 4-1 |
| German Open | 2019/10/08 11:00 | Wang-Wei Peng v Dennis Klein | L | 4-1 |
| Challenger Ochsenhausen | 2021/01/25 17:00 | Francisco Sanchi v Florian Bluhm | W | 0-3 |
| Challenger Ochsenhausen | 2021/01/25 13:30 | Dauud Cheaib v Florian Bluhm | L | 3-0 |
| Challenger Ochsenhausen | 2021/01/25 12:10 | Fedor Kuzmin v Florian Bluhm | L | 3-2 |
| Challenger Ochsenhausen | 2021/01/25 07:30 | Liang Qiu v Florian Bluhm | W | 2-3 |
| Challenger Ochsenhausen | 2021/01/15 11:45 | Dauud Cheaib v Florian Bluhm | L | 3-2 |
| Challenger Ochsenhausen | 2021/01/15 10:10 | Florian Bluhm v Josip Huzjak | L | 1-3 |
| Challenger Ochsenhausen | 2021/01/15 08:10 | Florian Bluhm v Dillon Chambers | W | 3-0 |
| Challenger Ochsenhausen | 2021/01/14 11:30 | Florian Bluhm v Evgueni Chtchetinine | L | 2-3 |