| UTR Pro Tennis Series Sofia | 2021/08/30 07:00 | Leonid Sheyngezikht v Tadija Radovanovic | 6-2,6-3 |
| ITF M15 Novi Sad | 2021/08/01 08:30 | Tadija Radovanovic v Alan Postay | 2-6,2-6 |
| ITF M15 Novi Sad | 2021/07/25 12:00 | Rrezart Cungu v Tadija Radovanovic | 7-6,6-3 |
| ITF M15 Doboj | 2021/07/11 12:30 | Petar Jovanovic v Tadija Radovanovic | 6-3,6-2 |
| ITF M25 Velenje | 2021/07/05 09:00 | Domagoj Biljesko v Tadija Radovanovic | 6-4,4-6,11-9 |
| ITF M25 Velenje | 2021/07/04 07:30 | Drazen Petrovic v Tadija Radovanovic | 4-6,3-6 |
| ITF M25 Belgrade | 2021/06/28 07:00 | George Botezan v Tadija Radovanovic | 7-6,6-2 |
| ITF M25 Belgrade | 2021/06/27 07:00 | Tadija Radovanovic v Milos Vukovic | 6-7,6-4,10-8 |
| UTR Pro Tennis Series Sofia | 2021/08/30 10:00 | Alexandru Luca v Ivan Mikhaylyuk | 2-6,2-6 |
| UTR Pro Tennis Series Sofia | 2021/08/29 12:30 | Ivan Penev v Alexandru Luca | 6-1,6-4 |