Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Pardubice | 2021/09/23 07:30 | Mark Havlicek v Nejedly, Pavel | 6-7,6-7 |
| ITF M25 Pardubice | 2021/09/21 09:30 | Tim Handel v Mark Havlicek | 7-5,6-1 |
| ITF M25 Pardubice | 2021/09/20 10:00 | Vitek Horak v Mark Havlicek | 6-7,3-6 |
| ITF M25 Ricany | 2021/08/31 08:00 | Jonas Forejtek v Mark Havlicek | 6-2,6-1 |
| ITF M25 Ricany | 2021/08/30 10:00 | Mark Havlicek v Caspar Schuetze | 6-1,6-2 |
| Prostejov, Singles M-ITF-CZE-04A | 2021/08/18 09:15 | Zsombor Piros v Mark Havlicek | 6-3,6-2 |
| Prostejov, Singles M-ITF-CZE-04A | 2021/08/17 12:15 | Mark Havlicek v Simon Malis | 6-1,6-2 |
| Prostejov, Singles M-ITF-CZE-04A | 2021/08/16 07:55 | Mark Havlicek v Jan Jermar | 6-1,6-0 |
| ITF M25 Pardubice | 2021/09/20 09:00 | Filip Duda v Katuch, Jakub | 6-1,6-1 |
| ITF M25 Ricany | 2021/08/29 09:00 | Katuch, Jakub v Martin Benes | 3-6,3-6 |
| ITF M15 Bratislava | 2021/08/23 09:00 | Semjan, Marek v Katuch, Jakub | 6-4,6-4 |
| ITF M25 Telfs | 2021/07/11 09:00 | Katuch, Jakub v Niklas Waldner | 1-6,3-6 |
| ITF M25 Most | 2021/05/23 14:00 | Katuch, Jakub v Ibrahim, Hasan | 1-6,4-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 08:30 | Stanek, Robin v Katuch, Jakub | 6-1,6-2 |
| ITF M25 Prague | 2021/05/09 07:30 | Katuch, Jakub v Andrew Paulson | 3-6,6-3,6-10 |
| ITF M15 Bratislava | 2021/03/08 12:00 | Katuch, Jakub v Luca Van Assche | 2-6,2-6 |