Stadium: Court 3 Round: 44 Ground: Clay
| ITF M15 Ulcinj | 2021/08/30 07:30 | Pietro Marino v Aleksandar Mihailovic | 5-7,6-4,10-7 |
| ITF M25 Lesa | 2021/08/25 12:15 | Pietro Marino v Matteo Martineau | 1-6,4-6 |
| ITF M25 Lesa | 2021/08/23 14:00 | Pietro Marino v Giacomo Crisostomo | 6-2,6-2 |
| ITF M25 Lesa | 2021/08/22 12:10 | Pietro Marino v Alessio Zanotti | 4-6,6-3,11-9 |
| ITF M15 Pescara | 2021/08/16 07:15 | Fausto Tabacco v Pietro Marino | 7-5,6-0 |
| ITF M15 Pescara | 2021/08/15 11:30 | Alberto Morolli v Pietro Marino | 6-7,6-7 |
| ITF M15 Monastir | 2021/08/04 07:30 | Omni Kumar v Pietro Marino | 6-2,6-2 |
| ITF M15 Monastir | 2021/08/03 07:30 | Rishab Agarwal v Pietro Marino | 6-7,3-6 |
| ITF M15 Ulcinj | 2021/08/30 07:30 | Aleksa Mardjonovic v Obrad Markovski | 6-7,7-5,11-9 |
| ITF M15 Novi Sad | 2021/08/03 10:10 | Aleksa Mardjonovic v Valerio Aboian | 2-6,7-5,10-12 |
| 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 |