| TT Star Series | 2021/05/27 13:45 | Jakub Kleprlik v Jakub Zelinka | L | 3-1 |
| TT Star Series | 2021/09/06 08:15 | Jakub Zelinka v Frane Runjic | W | 3-1 |
| TT Star Series | 2021/09/06 06:00 | Jakub Zelinka v Oleksandr Tymofieiev | W | 3-2 |
| Czech Open | 2021/08/22 12:05 | Jeet Chandra v Jakub Zelinka | L | 3-1 |
| Czech Open | 2021/08/21 10:25 | Jakub Zelinka v Zhenlong Liu | W | 3-1 |
| WTT Contender Budapest | 2021/08/15 18:00 | Aleksandr Tyutryumov v Jakub Zelinka | L | 3-2 |
| WTT Contender Budapest | 2021/08/15 08:00 | Jakub Zelinka v Balazs Lei | W | 3-0 |
| Others | 2021/08/03 14:01 | Jakub Folwarski v Jakub Zelinka | W | 1-3 |
| TT Star Series | 2021/08/03 12:45 | Jiri Vrablik v Jakub Zelinka | L | 3-1 |
| TT Star Series | 2021/09/06 08:45 | Jakub Kleprlik v David Reitspies | L | 0-3 |
| TT Star Series | 2021/09/06 07:10 | Jakub Kleprlik v Michal Benes | W | 3-0 |
| Others | 2021/08/27 13:45 | Jakub Kleprlik v Dmitrij Prokopcov | L | 0-3 |
| TT Star Series | 2021/08/27 12:45 | Jakub Kleprlik v Michal Obeslo | L | 0-3 |
| TT Star Series | 2021/08/27 10:45 | Michal Obeslo v Jakub Kleprlik | L | 3-1 |
| TT Star Series | 2021/08/27 08:15 | Dmitrij Prokopcov v Jakub Kleprlik | L | 3-1 |
| TT Star Series | 2021/08/27 06:35 | Michal Bankosz v Jakub Kleprlik | W | 0-3 |
| TT Star Series | 2021/08/26 13:45 | Jakub Kleprlik v Abdel Kader Salifou | W | 3-1 |