Stadium: Court 7 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/09/29 10:40 | Marek, Wojciech v Daisuke Sumizawa | 3-6,4-6 |
| ITF M15 Zilina | 2021/09/02 07:55 | Marek, Wojciech v Mariano Navone | 7-5,5-7,6-7 |
| ITF M15 Zilina | 2021/09/01 09:20 | Marek, Wojciech v Andrej Krajcik | 6-0,6-3 |
| Challenger Warsaw | 2021/08/22 09:00 | Marek, Wojciech v Daniel Michalski | 6-7,1-6 |
| ITF M15 Lodz | 2021/08/20 08:00 | Wojcik, Yann v Marek, Wojciech | 7-6,6-3 |
| ITF M15 Lodz | 2021/08/19 07:55 | Marek, Wojciech v Eriksson, Markus | 6-4,7-5 |
| ITF M15 Lodz | 2021/08/18 11:25 | Marek, Wojciech v Olaf Pieczkowski | 5-7,6-4,6-1 |
| ITF M15 Gdynia | 2021/08/12 08:00 | Alejo Lorenzo Lingua Lavallen v Marek, Wojciech | 3-6,6-3,6-3 |
| Pirot, Singles M-ITF-SRB-05A | 2021/09/23 09:30 | Aldin Setkic v Viktor Jovic | 6-1,6-4 |
| ITF M15 Zlatibor | 2021/09/15 11:30 | Gergely Madarasz v Viktor Jovic | 6-2,6-4 |
| ITF M15 Ulcinj | 2021/08/30 07:30 | Viktor Jovic v Leonardo Catani | 6-4,6-4 |
| ITF M15 Novi Sad | 2021/08/04 11:20 | Viktor Jovic v Peter Fajta | 4-6,6-7 |
| ITF M15 Novi Sad | 2021/07/27 12:30 | Madaras, Dragos Nicolae v Viktor Jovic | 6-1,6-1 |
| ITF - M15 Doboj | 2021/07/15 10:15 | Gergely Madarasz v Viktor Jovic | 6-4,6-3 |
| ITF - M15 Doboj | 2021/07/14 11:20 | Stevan Popovic v Viktor Jovic | 4-6,2-6 |
| ITF - M15 Doboj | 2021/07/13 09:45 | Viktor Jovic v Malesevic, Nemanja | 0-6,6-4,10-8 |