| TT Star Series | 2021/07/01 13:15 | Jakub Seibert v David Reitspies | W | 0-3 |
| TT Star Series | 2021/06/29 07:10 | David Reitspies v Jakub Seibert | W | 3-1 |
| TT Star Series | 2021/06/21 13:45 | Jakub Seibert v David Reitspies | W | 1-3 |
| TT Star Series | 2021/05/24 11:45 | David Reitspies v Jakub Seibert | W | 3-0 |
| TT Star Series | 2021/04/20 09:45 | David Reitspies v Jakub Seibert | W | 3-0 |
| TT Star Series | 2021/04/12 08:15 | Jakub Seibert v David Reitspies | W | 0-3 |
| TT Star Series | 2021/04/06 12:44 | David Reitspies v Jakub Seibert | W | 3-0 |
| TT Star Series | 2021/04/06 08:15 | Jakub Seibert v David Reitspies | W | 1-3 |
| TT Star Series | 2021/09/20 07:45 | Viktor Brodd v David Reitspies | W | 0-3 |
| Challenger Ochsenhausen | 2021/09/14 14:40 | Dauud Cheaib v David Reitspies | W | 2-3 |
| Challenger Ochsenhausen | 2021/09/14 13:15 | David Reitspies v Evgueni Chtchetinine | W | 3-1 |
| Challenger Ochsenhausen | 2021/09/14 11:00 | David Reitspies v Fedor Kuzmin | W | 3-2 |
| Challenger Ochsenhausen | 2021/09/14 07:40 | David Reitspies v Dauud Cheaib | L | 2-3 |
| Challenger Ochsenhausen | 2021/09/13 18:40 | David Reitspies v Florian Bluhm | W | 3-0 |
| Challenger Ochsenhausen | 2021/09/13 17:20 | David Reitspies v Niagol Stoyanov | W | 3-0 |
| Challenger Ochsenhausen | 2021/09/13 11:50 | David Reitspies v Alexander Valuch | W | 3-0 |
| Challenger Series TT | 2021/09/03 13:48 | Jakub Seibert v Miroslav Sklensky | W | 3-2 |
| TT Star Series | 2021/09/03 12:42 | Kamil Nalepa v Jakub Seibert | L | 3-2 |
| TT Star Series | 2021/09/03 10:45 | Jakub Seibert v Josef Braun | L | 2-3 |
| TT Star Series | 2021/09/03 09:15 | Jakub Seibert v Frane Runjic | W | 3-1 |
| TT Star Series | 2021/09/03 07:45 | Jakub Seibert v Igor Misztal | W | 3-0 |
| TT Star Series | 2021/09/02 12:15 | Miroslav Sklensky v Jakub Seibert | L | 3-0 |
| TT Star Series | 2021/09/02 10:15 | Kamil Nalepa v Jakub Seibert | L | 3-0 |
| TT Star Series | 2021/09/02 08:45 | Jakub Seibert v David Prusa | W | 3-0 |