| Czech Open | 2021/08/23 12:20 | Sathiyan Gnanasekaran v Tomas Koldas | L | 4-0 |
| Czech Open | 2021/08/22 11:30 | Cedric Tschanz v Tomas Koldas | W | 2-3 |
| Czech Open | 2021/08/21 09:50 | Tomas Koldas v Adrian Dillon | W | 3-2 |
| WTT Contender Budapest | 2021/08/15 18:00 | Tomas Koldas v David Serdaroglu | L | 0-3 |
| TT Star Series | 2021/08/03 11:15 | Oleksandr Tymofieiev v Tomas Koldas | L | 3-1 |
| TT Star Series | 2021/08/03 09:45 | David Reitspies v Tomas Koldas | W | 0-3 |
| TT Star Series | 2021/08/03 07:45 | Daniel Kosiba v Tomas Koldas | W | 0-3 |
| TT Star Series | 2021/08/02 13:15 | Jiri Vrablik v Tomas Koldas | L | 3-0 |
| Challenger Ochsenhausen | 2021/09/10 16:56 | Patryk Zatowka v Boguslav Koszyk | W | 1-3 |
| TT Star Series | 2021/01/26 12:45 | Tomas Tregler v Boguslav Koszyk | L | 3-0 |
| TT Star Series | 2021/01/26 10:45 | Boguslav Koszyk v Michal Obeslo | L | 1-3 |
| TT Star Series | 2021/01/26 08:10 | Dmitrij Prokopcov v Boguslav Koszyk | L | 3-2 |
| TT Star Series | 2021/01/25 15:45 | Petr David v Boguslav Koszyk | L | 3-1 |
| TT Star Series | 2021/01/25 12:15 | Ondrej Bajger v Boguslav Koszyk | L | 3-1 |
| TT Star Series | 2021/01/25 09:45 | Miroslav Horejsi v Boguslav Koszyk | W | 2-3 |
| TT Star Series | 2021/01/25 07:35 | Antonin Gavlas v Boguslav Koszyk | L | 3-0 |