| TT Star Series | 2023/05/02 09:45 | Boguslav Koszyk v Jakub Seibert | L | 3-2 |
| TT Star Series | 2022/06/10 10:45 | Boguslav Koszyk v Jakub Seibert | L | 3-1 |
| TT Star Series | 2020/12/15 11:15 | Jakub Seibert v Boguslav Koszyk | L | 2-3 |
| TT Star Series | 2020/12/07 12:15 | Boguslav Koszyk v Jakub Seibert | L | 3-0 |
| Czech TT Star Series | 2020/10/05 08:15 | Boguslav Koszyk v Jakub Seibert | L | 3-2 |