| UTR Pro Tennis Series - Belgrado | 2021/07/07 10:30 | Nikola Slavic v Constant De La Bassetiere | 6-4,5-4 |
| UTR Pro Tennis Series - Belgrado | 2021/07/06 14:00 | Nikola Slavic v Michalis Sakellaridis | 6-3,6-6 |
| UTR Pro Tennis Series - Belgrado | 2021/07/05 07:30 | Nikola Slavic v Dusan Obradovic | 6-7,6-7 |
| ITF M25 Belgrade | 2021/06/30 08:45 | Nikola Slavic v Akira Santillan | 1-6,1-6 |
| ITF M25 Belgrade | 2021/06/29 09:00 | George Botezan v Nikola Slavic | 4-6,2-6 |
| ITF M25 Belgrade | 2021/06/28 07:00 | Nikola Slavic v Toby Martin | 6-4,6-3 |
| ITF M25 Belgrade | 2021/06/27 07:00 | Paul Valsecchi v Nikola Slavic | 4-6,4-6 |
| ITF M15 Ystad | 2019/08/06 11:35 | Simon Yitbarek v Nikola Slavic | 6-3,6-2 |
| UTR Pro Tennis Series - Belgrado | 2021/07/07 10:30 | Dusan Obradovic v Olexiy Kolisnyk | 6-0,5-4 |
| UTR Pro Tennis Series - Belgrado | 2021/07/05 07:30 | Michalis Sakellaridis v Olexiy Kolisnyk | 3-5 |
| ITF 15 Antalya | 2021/06/30 08:50 | Olexiy Kolisnyk v Louroi Martinez | 6-2,2-6,1-6 |
| ITF 15 Antalya | 2021/06/29 06:30 | Olexiy Kolisnyk v Lorenzo Joaquin Rodriguez | 6-2,6-1 |
| ITF 15 Antalya | 2021/06/28 07:55 | Ray Ho v Olexiy Kolisnyk | 6-3,2-6,9-11 |
| ITF 15 Antalya | 2021/06/27 06:30 | Alessandro Ragazzi v Olexiy Kolisnyk | 6-7,3-6 |
| ITF 15 Antalya | 2021/06/25 07:00 | Olexiy Kolisnyk v Fabian Marozsan | 2-6,3-6 |
| ITF 15 Antalya | 2021/06/24 07:00 | Olexiy Kolisnyk v Marsel Ilhan | 6-2,6-3 |