| UTR Pro Tennis Series Nis | 2021/10/09 14:15 | Denys Klok v Lazar Radenkovic | 1-6,3-5 |
| UTR Pro Tennis Series Nis | 2021/10/08 17:00 | Duje Kekez v Lazar Radenkovic | 6-1,5-1 |
| UTR Pro Tennis Series Nis | 2021/10/07 08:30 | Ivan Denisov v Lazar Radenkovic | 6-0,6-1 |
| UTR Pro Tennis Series Nis | 2021/10/06 10:00 | Petar Pjevcevic v Lazar Radenkovic | 4-6,6-3,6-2 |
| UTR Pro Tennis Series Nis | 2021/10/04 08:30 | Vladimir Popov v Lazar Radenkovic | 6-1,5-2 |
| UTR Pro Tennis Series Nis | 2021/10/09 13:45 | Dusan Trunic v Stefan Ivic | 0-6,1-6 |
| UTR Pro Tennis Series Nis | 2021/10/08 14:15 | Stefan Ivic v Veljko Krstic | 6-4,3-6,1-5 |
| UTR Pro Tennis Series Nis | 2021/10/06 08:30 | Stefan Ivic v Oleksandr Bielinskyi | 4-6,6-2,6-0 |
| UTR Pro Tennis Series Nis | 2021/10/05 09:00 | Stefan Ivic v Lawrence Bataljin | 4-6,4-5 |
| UTR Pro Tennis Series Nis | 2021/10/04 10:00 | Ivan Liutarevich v Stefan Ivic | 6-4,6-0 |
| ITF M15 Pirot | 2021/09/20 09:30 | Stefan Ivic v Goran Zivotic | 3-6,3-6 |
| ITF M15 Pirot | 2021/09/19 09:30 | Jamie Krattiger v Stefan Ivic | 4-6,1-6 |
| ITF M15 Zlatibor | 2021/09/14 08:00 | Jasza Szajrych v Stefan Ivic | 6-3,6-3 |