Ground: Hardcourt outdoor
| ITF M15 Zlatibor | 2019/09/15 06:30 | Tadija Radovanovic v Christos Keisidis | 2-6,1-6 |
| UTR Pro Tennis Series Zadar | 2021/11/19 09:00 | Deni Zmak v Christos Keisidis | 6-1,6-0 |
| UTR Pro Tennis Series Zadar | 2021/11/18 10:30 | Christos Keisidis v Alexander Chepik | 6-3,6-2 |
| UTR Pro Tennis Series Zadar | 2021/11/16 09:00 | Christos Keisidis v Denis Parshutin | 6-3,6-7,6-3 |
| UTR Pro Tennis Series Zadar | 2021/11/15 12:00 | Olexiy Kolisnyk v Christos Keisidis | 7-5,3-6,4-6 |
| UTR Pro Tennis Series Nis | 2021/10/10 08:00 | Christos Keisidis v Vladimir Popov | 6-1,5-2 |
| UTR Pro Tennis Series Nis | 2021/10/09 11:00 | Christos Keisidis v Lawrence Bataljin | 6-4,6-2 |
| UTR Pro Tennis Series Nis | 2021/10/08 15:45 | Dusan Trunic v Christos Keisidis | 2-6,2-5 |
| UTR Pro Tennis Series Nis | 2021/10/07 08:30 | George Botezan v Christos Keisidis | 6-3,6-3 |
| UTR Pro Tennis Series Bucharest | 2022/03/06 09:30 | Tadija Radovanovic v Goran Zivotic | 3-6,5-7 |
| ITF M25 Pretoria | 2021/09/28 07:00 | Menelaos Efstathiou v Tadija Radovanovic | 6-2,6-1 |
| ITF M25 Pretoria | 2021/09/27 08:40 | Tadija Radovanovic v Leonardo Taddia | 6-2,6-3 |
| ITF M25 Pretoria | 2021/09/26 07:00 | Tadija Radovanovic v Rico Gore | 6-2,6-0 |
| ITF M25 Johannesburg | 2021/09/20 08:15 | Tadija Radovanovic v Sahar Simon | 2-6,2-6 |
| ITF M25 Johannesburg Qual | 2021/09/19 07:00 | Tom Saporta v Tadija Radovanovic | 4-6,5-7 |
| ITF M25 Johannesburg | 2021/09/13 13:25 | Dylan Salton v Tadija Radovanovic | 6-3,6-4 |
| ITF M25 Johannesburg | 2021/09/13 07:30 | Tadija Radovanovic v Boitshepo Maake | 6-1,6-3 |