Stadium: Court 3 Round: 62 Ground: Clay
| UTR Pro Tennis Series Beograd | 2021/07/11 07:00 | Stefan Milicevic v Aleksa Mardjonovic | 6-4,6-2 |
| UTR Pro Tennis Series Beograd | 2021/07/10 10:00 | Petar Teodorovic v Aleksa Mardjonovic | 2-6,6-4,3-6 |
| UTR Pro Tennis Series Beograd | 2021/07/09 10:00 | Aleksa Mardjonovic v Viktor Jovic | 1-6,1-6 |
| UTR Pro Tennis Series Beograd | 2021/07/08 10:30 | Aleksa Mardjonovic v Yaraslav Shyla | 4-6,0-6 |
| UTR Pro Tennis Series Beograd | 2021/07/07 12:00 | Jean Thirouin v Aleksa Mardjonovic | 6-4,6-2 |
| UTR Pro Tennis Series Beograd | 2021/07/06 07:30 | Stefan Latinov v Aleksa Mardjonovic | 3-6,1-6 |
| ITF M25 Belgrade | 2021/06/28 07:00 | Quentin Folliot v Aleksa Mardjonovic | 6-3,7-5 |
| ITF M25 Belgrade | 2021/06/27 09:00 | Valentin Vanta v Aleksa Mardjonovic | 5-7,3-6 |
| ITF M15 Monastir | 2021/06/27 09:00 | Berk Ilkel v Brandon Lam | 6-2,6-7,5-10 |
| ITF M15 Monastir | 2021/06/20 08:00 | Takashi Saito v Berk Ilkel | 6-2,6-3 |
| ITF M15 Monastir | 2021/06/13 10:00 | Berk Ilkel v Aidan Mayo | 4-6,6-2,5-10 |
| ITF M15 Monastir | 2021/05/20 11:25 | Gustavo Heide v Berk Ilkel | 7-5,6-4 |
| ITF M15 Monastir | 2021/05/19 08:30 | Berk Ilkel v Tomas Farjat | 7-5,7-6 |
| ITF M15 Monastir | 2021/05/10 09:00 | Berk Ilkel v Tomas Farjat | 4-6,4-6 |
| ITF M15 Monastir | 2021/05/09 11:00 | Berk Ilkel v Alessandro Pecci | 7-6,1-6,12-10 |
| ITF M15 Monastir | 2021/04/20 08:00 | Guy Orly Iradukunda v Berk Ilkel | 6-4,6-2 |