| TT Star Series | 2021/08/12 09:45 | Andriy Sitak v Romualdo Manna | W | 3-2 |
| TT Star Series | 2021/08/12 07:45 | Andriy Sitak v Daniel Kosiba | L | 1-3 |
| Challenger - Ochsenhausen | 2021/07/09 10:30 | Andriy Sitak v Evgueni Chtchetinine | W | 3-0 |
| Challenger - Ochsenhausen | 2021/07/09 07:50 | Andriy Sitak v Snehit Suravajjula | L | 0-3 |
| Challenger - Ochsenhausen | 2021/07/08 11:50 | Andriy Sitak v Dwain Schwarzer | W | 3-0 |
| Challenger - Ochsenhausen | 2021/07/08 08:30 | Andriy Sitak v Sven Happek | W | 3-2 |
| Challenger - Ochsenhausen | 2021/07/07 11:50 | Andriy Sitak v Jeet Chandra | L | 1-3 |
| Challenger - Ochsenhausen | 2021/07/07 10:10 | Andriy Sitak v Fedor Kuzmin | L | 1-3 |
| TT Star Series | 2021/08/12 08:45 | Antonin Gavlas v Jan Valenta | L | 3-0 |
| TT Star Series | 2021/08/12 06:35 | Petr David v Jan Valenta | L | 3-2 |
| TT Star Series | 2021/05/14 11:45 | Ondrej Bajger v Jan Valenta | L | 3-2 |
| TT Star Series | 2021/05/14 09:45 | Jan Valenta v Jakub Kaucky | W | 3-2 |
| TT Star Series | 2021/05/14 07:10 | Miroslav Horejsi v Jan Valenta | L | 3-0 |
| TT Star Series | 2021/05/13 13:15 | Krystof Prida v Jan Valenta | W | 0-3 |
| TT Star Series | 2021/05/13 10:45 | Michal Benes v Jan Valenta | L | 3-0 |
| TT Star Series | 2021/05/13 08:15 | David Reitspies v Jan Valenta | L | 3-1 |