Stadium: Court 7 Round: 62 Ground: Clay
| ITF M15 Novi Sad | 2021/08/02 09:30 | Hamid Reza Nadaf v Aleksa Mardjonovic | 3-6,7-5,5-10 |
| ITF M15 Novi Sad | 2021/08/01 10:45 | Michalis Sakellaridis v Aleksa Mardjonovic | 2-6,2-6 |
| 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 |
| ITF M15 Novi Sad | 2021/08/02 11:00 | Valerio Aboian v Rrezart Cungu | 6-4,1-6,13-11 |
| ITF M15 Novi Sad | 2021/08/01 12:45 | Linghao Zhang v Valerio Aboian | 0-6,3-6 |
| ITF M15 Novi Sad | 2021/07/26 09:00 | Valerio Aboian v Peter Makk | 6-4,3-6,10-3 |
| ITF M15 Novi Sad | 2021/07/25 10:45 | Maxim Krapivin v Valerio Aboian | 2-6,0-6 |
| ITF M15 Cordoba | 2021/04/08 13:00 | Luciano Darderi v Valerio Aboian | 7-5,6-4 |
| ITF M15 Cordoba | 2021/04/07 13:30 | Valerio Aboian v Ignacio Carou | 6-2,6-0 |
| ITF M15 Cordoba | 2021/04/06 12:00 | Gonzalo Villanueva v Valerio Aboian | 6-7,3-6 |
| ITF M15 Cordoba | 2021/04/05 14:00 | Federico Pieckenstainer v Valerio Aboian | 2-6,2-6 |