| UTR Pro Tennis Series Beograd | 2021/07/08 09:00 | Constant De La Bassetiere v Michalis Sakellaridis | 6-2,5-4 |
| UTR Pro Tennis Series Beograd | 2021/07/07 10:30 | Nikola Slavic v Constant De La Bassetiere | 6-4,5-4 |
| UTR Pro Tennis Series Beograd | 2021/07/06 12:00 | Dusan Obradovic v Constant De La Bassetiere | 6-1,3-6,5-2 |
| UTR Pro Tennis Series Zadar | 2021/07/04 07:00 | Yaraslav Shyla v Constant De La Bassetiere | 7-6,4-6,5-7 |
| UTR Pro Tennis Series Zadar | 2021/07/03 09:30 | Arthus De La Bassetiere v Constant De La Bassetiere | 0-6,3-6 |
| UTR Pro Tennis Series Zadar | 2021/07/02 12:30 | Constant De La Bassetiere v Jerko Brkic | 7-6,5-2 |
| UTR Pro Tennis Series Zadar | 2021/07/01 09:30 | Constant De La Bassetiere v Frane Nincevic | 3-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/06/30 08:00 | Warren Sinius v Constant De La Bassetiere | 3-6,6-6 |
| UTR Pro Tennis Series Beograd | 2021/07/08 09:00 | Nikola Slavic v Olexiy Kolisnyk | 1-6,4-6 |
| UTR Pro Tennis Series Beograd | 2021/07/07 10:30 | Dusan Obradovic v Olexiy Kolisnyk | 6-0,5-4 |
| UTR Pro Tennis Series Beograd | 2021/07/05 07:30 | Michalis Sakellaridis v Olexiy Kolisnyk | 3-5 |
| ITF M15 Antalya | 2021/06/30 08:50 | Olexiy Kolisnyk v Louroi Martinez | 6-2,2-6,1-6 |
| ITF M15 Antalya | 2021/06/29 06:30 | Olexiy Kolisnyk v Lorenzo Joaquin Rodriguez | 6-2,6-1 |
| ITF M15 Antalya | 2021/06/28 07:55 | Ray Ho v Olexiy Kolisnyk | 6-3,2-6,9-11 |
| ITF M15 Antalya | 2021/06/27 06:30 | Alessandro Ragazzi v Olexiy Kolisnyk | 6-7,3-6 |
| ITF M15 Antalya | 2021/06/25 07:00 | Olexiy Kolisnyk v Fabian Marozsan | 2-6,3-6 |