Stadium: Court 7 Round: 62 Ground: Clay
| ITF - M15 Novi Sad | 2021/07/25 09:30 | Nemanja Malesevic v Michalis Sakellaridis | 2-6,6-4,10-3 |
| ITF - M25 Kottingbrunn | 2021/07/18 07:30 | Toby Martin v Michalis Sakellaridis | 6-1,6-2 |
| UTR Pro Tennis Series - Beograd | 2021/07/11 10:00 | Michalis Sakellaridis v Stefan Latinov | 1-6,2-6 |
| UTR Pro Tennis Series - Beograd | 2021/07/10 13:00 | Michalis Sakellaridis v Aleksei Khomich | 6-4,0-0 |
| UTR Pro Tennis Series - Beograd | 2021/07/09 07:30 | Dusan Obradovic v Michalis Sakellaridis | 6-4,5-4 |
| UTR Pro Tennis Series - Beograd | 2021/07/08 09:00 | Constant De La Bassetiere v Michalis Sakellaridis | 6-2,5-4 |
| UTR Pro Tennis Series - Beograd | 2021/07/06 14:00 | Nikola Slavic v Michalis Sakellaridis | 6-3,6-6 |
| UTR Pro Tennis Series - Beograd | 2021/07/05 07:30 | Michalis Sakellaridis v Olexiy Kolisnyk | 3-5 |
| ITF - M15 Novi Sad | 2021/07/26 10:30 | Roman Andres Burruchaga v Aleksa Mardjonovic | 6-3,7-6 |
| ITF - M15 Novi Sad | 2021/07/25 12:00 | Aleksa Mardjonovic v Berk Ilkel | 6-2,7-5 |
| 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 |