| 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 |
| 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 08:45 | Stefan Ivic v Luka Todorovic | 6-4,6-1 |
| UTR Pro Tennis Series Nis | 2021/10/07 08:30 | Lawrence Bataljin v Veljko Krstic | 7-6,3-6,5-7 |
| UTR Pro Tennis Series Nis | 2021/10/05 09:30 | Ivan Liutarevich v Veljko Krstic | 5-7,6-4,6-2 |
| UTR Pro Tennis Series Nis | 2021/10/04 08:30 | Veljko Krstic v Oleksandr Bielinskyi | 5-7,6-1,6-3 |
| ITF M15 Zlatibor | 2021/09/16 09:40 | Oleksandr Ovcharenko v Veljko Krstic | 6-1,6-1 |
| ITF M15 Zlatibor | 2021/09/14 11:10 | Tomislav Jotovski v Veljko Krstic | 4-6,1-6 |
| ITF M25 Belgrád | 2021/06/29 10:40 | Skander Mansouri v Veljko Krstic | 7-6,7-5 |