| Challenger - Ochsenhausen | 2019/07/09 11:00 | Sven Happek v Andriy Sitak | L | 3-2 |
| Challenger - Ochsenhausen | 2019/05/15 09:50 | Sven Happek v Andriy Sitak | W | 1-3 |
| Challenger - Ochsenhausen | 2018/06/22 09:50 | Andriy Sitak v Sven Happek | L | 0-3 |
| Challenger - Ochsenhausen | 2018/03/13 09:20 | Andriy Sitak v Sven Happek | W | 3-0 |
| 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 |
| Challenger - Ochsenhausen | 2021/07/07 08:30 | Andriy Sitak v Valerij Rakov | L | 0-3 |
| Ucrânia - TT Cup | 2021/06/11 22:15 | Andriy Sitak v Vitaliy Lyevshin | L | 0-3 |
| Ucrânia - TT Cup | 2021/06/11 21:40 | Andriy Sitak v Valeriy Melnik | W | 3-0 |
| Ucrânia - TT Cup | 2021/06/11 21:05 | Andriy Sitak v Bohdan Kohut | W | 3-1 |
| Ucrânia - TT Cup | 2021/06/11 20:00 | Andriy Sitak v Vitaliy Lyevshin | L | 2-3 |
| Ucrânia - TT Cup | 2021/06/11 19:30 | Andriy Sitak v Valeriy Melnik | W | 3-2 |
| Challenger - Ochsenhausen | 2021/07/07 13:10 | Sven Happek v Evgueni Chtchetinine | L | 2-3 |
| Challenger - Ochsenhausen | 2021/07/07 11:00 | Sven Happek v Snehit Suravajjula | L | 0-3 |
| Challenger - Ochsenhausen | 2021/07/07 09:45 | Sven Happek v Dwain Schwarzer | W | 3-2 |
| Challenger - Ochsenhausen | 2021/06/18 12:50 | Sven Happek v Harmeet Desai | L | 0-3 |
| Challenger - Ochsenhausen | 2021/06/18 11:25 | Dauud Cheaib v Sven Happek | L | 3-1 |
| Challenger - Ochsenhausen | 2021/06/18 09:50 | Sven Happek v Fedor Kuzmin | L | 2-3 |
| Challenger - Ochsenhausen | 2021/06/18 07:10 | Sven Happek v Harmeet Desai | L | 1-3 |
| Challenger - Ochsenhausen | 2021/06/17 10:30 | Sven Happek v Miguel Chamorro | L | 2-3 |