| ITF M15 Pirot | 2021/09/19 12:30 | Dusan Trunic v Aleksa Mardjonovic | 4-6,6-2,7-10 |
| ITF M15 Pirot | 2021/09/21 12:25 | Aleksa Mardjonovic v Kristijan Juhas | 2-6,4-6 |
| ITF M15 Pirot | 2021/09/20 11:00 | Paul Valsecchi v Aleksa Mardjonovic | 4-6,6-4,6-10 |
| ITF M15 Pirot | 2021/09/19 12:30 | Dusan Trunic v Aleksa Mardjonovic | 4-6,6-2,7-10 |
| ITF M15 Zlatibor | 2021/09/15 13:20 | Aleksa Mardjonovic v Petar Pjevcevic | 6-1,3-6,3-6 |
| ITF M15 Ulcinj | 2021/09/05 07:30 | Aleksa Mardjonovic v Alessandro Procopio | 7-6,4-6,6-10 |
| ITF M15 Ulcinj | 2021/08/30 13:30 | Pietro Marino v Aleksa Mardjonovic | 6-4,7-6 |
| 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 Pirot | 2021/09/19 12:30 | Dusan Trunic v Aleksa Mardjonovic | 4-6,6-2,7-10 |
| ITF M15 Zlatibor | 2021/09/13 08:00 | Dusan Trunic v Stefan Ivic | 6-4,1-6,8-10 |
| ITF M15 Zlatibor | 2021/09/12 07:30 | Dusan Trunic v Ognjen Pavlovic | 6-1,6-1 |
| UTR Pro Tennis Series Portoroz | 2021/08/28 08:30 | Dusan Trunic v Julien De Cuyper | 3-0 |
| UTR Pro Tennis Series Portoroz | 2021/08/27 13:30 | Egor Agafonov v Dusan Trunic | 6-1,7-5 |
| UTR Pro Tennis Series Portoroz | 2021/08/26 14:00 | Yanais Laurent v Dusan Trunic | 6-1,6-1 |
| ITF M15 Sarajevo | 2021/06/02 10:30 | Dusan Trunic v Simon Beaupain | 2-6,4-6 |