Stadium: Court 7 Round: 62 Ground: Clay
| ITF M15 - Sibenik | 2021/04/20 08:00 | Alen Rogic-Hadzalic v Ondrej Horak | 6-1,6-4 |
| ITF M15 - Sibenik | 2021/04/19 12:15 | Ondrej Horak v Boris Butulija | 6-2,7-6 |
| ITF M15 - Sharm El Sheikh | 2021/03/24 11:20 | Ondrej Horak v Paul Jubb | 2-6,0-6 |
| ITF M15 - Sharm El Sheikh | 2021/03/15 07:30 | Niels Visker v Ondrej Horak | 6-7,7-6,13-11 |
| ITF M15 Las Palmas | 2021/04/25 11:00 | Jan Jermar v Xavier Gabarro | 0-6,2-6 |
| ITF M15 - Sibenik | 2021/04/18 10:00 | Petr Hajek v Jan Jermar | 6-2,6-1 |
| ITF M15 - Sharm El Sheikh | 2021/04/05 10:00 | Sean Hodkin v Jan Jermar | 7-5,6-2 |
| ITF M15 - Sharm El Sheikh | 2021/04/04 07:30 | Shahar Gabay v Jan Jermar | 1-6,1-6 |
| ITF M15 - Sharm El Sheikh | 2021/03/28 17:30 | Matej Galik v Jan Jermar | 6-0,6-1 |
| ITF M15 - Sharm El Sheikh | 2021/03/22 11:30 | Jan Jermar v Sebastian Eguez | 5-7,7-6,8-10 |
| ITF M15 - Sharm El Sheikh | 2021/03/21 14:30 | Jan Jermar v Zakai Stone | 6-1,6-2 |
| ITF M15 - Bratislava | 2021/03/08 15:00 | Jan Jermar v Constantin Bittoun Kouzmine | 6-7,2-6 |