| UTR Pro Tennis Series Portoroz | 2021/08/24 08:30 | Nik Razborsek v Olexiy Kolisnyk | 5-7,6-2,2-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/21 09:30 | Olexiy Kolisnyk v Deni Zmak | 4-6,6-7 |
| UTR Pro Tennis Series Portoroz | 2021/08/20 11:00 | Olexiy Kolisnyk v Lawrence Bataljin | 6-3,6-2 |
| UTR Pro Tennis Series Portoroz | 2021/08/18 08:00 | George Botezan v Olexiy Kolisnyk | 5-7,1-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/17 09:30 | Teodor Ureche v Olexiy Kolisnyk | 0-6,2-5 |
| UTR Pro Tennis Series Barcelona | 2021/08/15 08:00 | Olexiy Kolisnyk v Federico Zeballos | 2-6,6-2,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/08/14 06:30 | Olexiy Kolisnyk v Jordi Mas De Ugarte | 6-3,6-1 |
| UTR Pro Tennis Series Barcelona | 2021/08/13 06:30 | Xavier Gabarro v Olexiy Kolisnyk | 3-6,3-6 |
| ITF M15 Doboj | 2021/07/15 10:30 | Andrew Fenty v Vladan Tadic | 7-6,5-7,6-3 |
| ITF M15 Doboj | 2021/07/14 16:05 | Vladan Tadic v Aziz Ouakaa | 7-5,6-4 |
| ITF M15 Doboj | 2021/07/13 08:00 | Vladan Tadic v Marko Stakusic | 6-3,6-4 |
| ITF M15 Doboj | 2021/07/12 09:30 | Stefan Micov v Vladan Tadic | 6-4,3-6,4-10 |
| ITF M15 Doboj | 2021/07/11 08:15 | Stefan Ivic v Vladan Tadic | 3-6,6-3,8-10 |
| ITF M15 Sarajevo | 2021/05/31 12:00 | Ali Habib v Vladan Tadic | 4-6,6-3,10-6 |
| ITF M15 Brcko | 2021/05/16 14:00 | Vladan Tadic v Lilian Breut | 4-6,4-6 |
| ITF M15 Prijedor | 2021/05/09 09:30 | Vladan Tadic v Dusan Rajic | 3-6,4-6 |