| UTR Pro Tennis Series Portoroz | 2021/08/19 11:00 | Oleksandr Bielinskyi v Max Lukman | 3-6,6-1,6-1 |
| UTR Pro Tennis Series Portoroz | 2021/08/17 12:30 | Jan Dimitrijevic v Oleksandr Bielinskyi | 2-6,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/14 06:30 | Federico Zeballos v Oleksandr Bielinskyi | 6-0,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/08/13 06:51 | Ignasi Forcano v Oleksandr Bielinskyi | 6-3,3-6,3-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/13 06:30 | Dante Gennaro v Oleksandr Bielinskyi | 0-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/12 11:00 | Fermin Tenti v Oleksandr Bielinskyi | 4-6,3-5 |
| UTR Pro Tennis Series Barcelona | 2021/08/09 10:30 | Nicolas Bianchi v Oleksandr Bielinskyi | 6-4,5-4 |
| ITF M15 Telavi | 2021/08/03 09:45 | Oleksandr Bielinskyi v Yan Bondarevskiy | 6-7,3-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/20 11:00 | Colin Sinclair v Tilen Zitnik | 6-3,6-1 |
| UTR Pro Tennis Series Portoroz | 2021/08/19 15:30 | Colin Sinclair v Aleksa Pisaric | 6-3,5-2 |
| UTR Pro Tennis Series Portoroz | 2021/08/18 12:30 | Yanais Laurent v Colin Sinclair | 5-7,5-7 |
| UTR Pro Tennis Series Portoroz | 2021/08/17 11:00 | Jan Vehovec v Colin Sinclair | 2-6,1-5 |
| ITF M15 Sofia | 2021/07/06 09:50 | Colin Sinclair v Dragos Nicolae Madaras | 3-6,2-6 |
| ITF M25 Belgrade | 2021/06/30 07:00 | Colin Sinclair v Edoardo Eremin | 2-6,1-6 |
| UTR Pro Tennis Series Bucharest | 2021/05/23 07:00 | Nicolae Frunza v Colin Sinclair | 5-6 |
| UTR Pro Tennis Series Bucharest | 2021/05/22 12:30 | Ilya Snitari v Colin Sinclair | 6-4,6-7,6-7 |