| Challenger - Ochsenhausen | 2021/10/11 09:10 | Alexander Valuch v Dennis Klein | L | 3-1 |
| Challenger - Ochsenhausen | 2021/10/11 07:10 | Dennis Klein v Marius Henninger | L | 2-3 |
| Challenger - Ochsenhausen | 2021/08/31 14:40 | Dennis Klein v Andrei Putuntica | W | 3-2 |
| Challenger - Ochsenhausen | 2021/08/31 12:35 | Dennis Klein v Amirreza Abbasi | W | 3-2 |
| Challenger - Ochsenhausen | 2021/08/31 11:00 | Dennis Klein v Amirreza Abbasi | W | 3-0 |
| Challenger - Ochsenhausen | 2021/08/31 07:40 | Dennis Klein v Eduardo Gonzales | W | 3-0 |
| Challenger - Ochsenhausen | 2021/08/30 18:40 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger - Ochsenhausen | 2021/08/30 17:20 | Dennis Klein v Enio Mendes | W | 3-2 |
| Challenger - Ochsenhausen | 2021/10/11 11:10 | Jon Ander Guerricabeitia v Andriy Sitak | W | 0-3 |
| Challenger - Ochsenhausen | 2021/10/11 06:30 | Alexander Valuch v Andriy Sitak | L | 3-2 |
| TT Star Series | 2021/08/20 11:15 | Patrik Klos v Andriy Sitak | W | 1-3 |
| TT Star Series | 2021/08/20 09:45 | Tomas Konecny v Andriy Sitak | L | 3-0 |
| TT Star Series | 2021/08/20 07:45 | Miroslav Sklensky v Andriy Sitak | L | 3-0 |
| TT Star Series | 2021/08/19 13:15 | Jakub Seibert v Andriy Sitak | W | 1-3 |
| TT Star Series | 2021/08/19 10:45 | Enio Mendes v Andriy Sitak | L | 3-0 |
| TT Star Series | 2021/08/19 09:15 | Oleksandr Tymofieiev v Andriy Sitak | L | 3-1 |