Stadium: Court 1 Round: 54 Ground: Clay
| ITF - M25 Poznan | 2021/08/24 08:00 | Leonardo Aboian v Jan Jermar | 6-2,6-4 |
| ITF - M25 Poznan | 2021/08/22 08:00 | Bartlomiej Andrzejczak v Jan Jermar | 6-3,3-6,5-10 |
| ITF - M25 Prostejov | 2021/08/16 07:55 | Mark Havlicek v Jan Jermar | 6-1,6-0 |
| ITF - M25 Prostejov | 2021/08/15 10:00 | Patrik Jancovic v Jan Jermar | 6-7,2-6 |
| ITF - M15 Gdynia | 2021/08/08 08:00 | Yujiro Onuma v Jan Jermar | 6-4,2-6,10-5 |
| ITF - M25 Grodzisk Mazowiecki | 2021/08/02 12:20 | Jan Jermar v Roman Postolka | 2-6,0-6 |
| ITF - M25 Grodzisk Mazowiecki | 2021/08/01 16:05 | Sebastian Usiadek v Jan Jermar | 3-6,3-6 |
| ITF - M25 Kottingbrunn | 2021/07/19 13:45 | Jan Jermar v Francisco Vittar | 4-6,5-7 |
| ITF - M15 Bratislava | 2021/08/23 09:00 | Janos Fekete v Leyton Rivera | 6-2,7-5 |
| ITF - M15 Bratislava | 2021/08/17 08:00 | Leyton Rivera v Tomas Lanik | 6-7,2-6 |
| ITF - M15 Frederiksberg | 2021/08/04 09:25 | Ryan Nijboer v Leyton Rivera | 6-4,6-2 |
| ITF - M15 Frederiksberg | 2021/08/02 11:05 | Nazim Makhlouf v Leyton Rivera | 3-6,6-3,3-10 |
| ITF - M15 Frederiksberg | 2021/08/01 10:00 | Eirik Groener v Leyton Rivera | 2-6,5-7 |
| ITF - M15 Poprad | 2021/07/05 08:00 | Dominik Palan v Leyton Rivera | 6-3,6-2 |
| ITF - M15 Poprad | 2021/07/04 11:00 | Samo Polakovic v Leyton Rivera | 4-6,6-0,4-10 |
| ITF - M15 Skopje | 2021/06/07 13:00 | Toby Martin v Leyton Rivera | 7-6,5-7,11-9 |