| TT Star Series | 2021/09/20 09:15 | David Reitspies v Jakub Seibert | L | 3-0 |
| TT Star Series | 2021/07/01 13:15 | Jakub Seibert v David Reitspies | L | 0-3 |
| TT Star Series | 2021/06/29 07:10 | David Reitspies v Jakub Seibert | L | 3-1 |
| TT Star Series | 2021/06/21 13:45 | Jakub Seibert v David Reitspies | L | 1-3 |
| TT Star Series | 2021/05/24 11:45 | David Reitspies v Jakub Seibert | L | 3-0 |
| TT Star Series | 2021/04/20 09:45 | David Reitspies v Jakub Seibert | L | 3-0 |
| TT Star Series | 2021/04/12 08:15 | Jakub Seibert v David Reitspies | L | 0-3 |
| TT Star Series | 2021/04/06 12:44 | David Reitspies v Jakub Seibert | L | 3-0 |
| Others | 2021/09/24 15:08 | Jakub Kleprlik v Jakub Seibert | L | 3-2 |
| TT Star Series | 2021/09/21 11:15 | Viktor Brodd v Jakub Seibert | L | 3-0 |
| TT Star Series | 2021/09/21 09:45 | Tomas Tregler v Jakub Seibert | L | 3-1 |
| TT Star Series | 2021/09/21 07:45 | Oleksandr Tymofieiev v Jakub Seibert | W | 2-3 |
| TT Star Series | 2021/09/20 13:15 | Amirreza Abbasi v Jakub Seibert | L | 3-0 |
| TT Star Series | 2021/09/20 10:45 | Thomas Keinath v Jakub Seibert | L | 3-2 |
| TT Star Series | 2021/09/20 09:15 | David Reitspies v Jakub Seibert | L | 3-0 |
| Others | 2021/09/03 13:48 | Jakub Seibert v Miroslav Sklensky | W | 3-2 |
| Czech Extraleague | 2021/09/24 17:00 | Martin Koblizek v David Reitspies | W | 1-3 |
| Czech Extraleague | 2021/09/24 16:37 | Martin Olejnik v David Reitspies | W | 0-3 |
| Others | 2021/09/21 13:42 | David Reitspies v Viktor Brodd | L | 2-3 |
| TT Star Series | 2021/09/21 12:00 | David Reitspies v Tomas Tregler | W | 3-2 |
| TT Star Series | 2021/09/21 10:45 | Oleksandr Tymofieiev v David Reitspies | W | 1-3 |
| TT Star Series | 2021/09/21 08:15 | Thomas Keinath v David Reitspies | W | 0-3 |
| TT Star Series | 2021/09/20 13:45 | David Reitspies v Tomas Tregler | L | 2-3 |
| TT Star Series | 2021/09/20 11:45 | David Reitspies v Amirreza Abbasi | W | 3-1 |