Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Prostejov | 2021/08/18 09:15 | Zsombor Piros v Mark Havlicek | 6-3,6-2 |
| ITF M25 Prostejov | 2021/08/17 12:15 | Mark Havlicek v Simon Malis | 6-1,6-2 |
| ITF M25 Prostejov | 2021/08/16 07:55 | Mark Havlicek v Jan Jermar | 6-1,6-0 |
| ITF M25 Prostejov | 2021/08/15 09:00 | Timur Mukhtarulin v Mark Havlicek | 3-6,2-6 |
| ITF M25 Most | 2021/05/24 09:00 | Antonin Bolardt v Mark Havlicek | 6-2,6-2 |
| ITF M25 Most | 2021/05/23 14:00 | Tomas Papik v Mark Havlicek | 3-6,3-6 |
| ITF M25 Telfs | 2021/07/11 09:00 | Jakub Katuch v Niklas Waldner | 1-6,3-6 |
| ITF M25 Most | 2021/05/23 14:00 | Jakub Katuch v Hasan Ibrahim | 1-6,4-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 08:30 | Robin Stanek v Jakub Katuch | 6-1,6-2 |
| ITF M25 Prague | 2021/05/09 07:30 | Jakub Katuch v Andrew Paulson | 3-6,6-3,6-10 |
| ITF M15 Bratislava | 2021/03/08 12:00 | Jakub Katuch v Luca Van Assche | 2-6,2-6 |
| ITF M15 Bratislava | 2021/03/01 12:00 | Piotr Grynkowski v Jakub Katuch | 6-3,6-1 |
| ITF M15 Bratislava | 2020/11/23 09:00 | Jakub Katuch v Noah Thurner | 6-7,7-5,9-11 |
| ITF M15 Piestany | 2019/05/06 08:00 | Johannes Bangratz v Jakub Katuch | 6-0,6-3 |