| 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 08:00 | Denis Parshutin v Deni Zmak | 3-6,1-5 |
| UTR Pro Tennis Series Portoroz | 2021/08/19 10:35 | Alec Adamson v Deni Zmak | 0-6,2-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/17 08:00 | Gal Emersic Potocnik v Deni Zmak | 1-6,4-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/16 08:00 | Deni Zmak v Timur Maulenov | 6-0,6-0 |
| UTR Pro Tennis Series Zadar | 2021/07/04 10:00 | Matija Pecotic v Deni Zmak | 6-3,6-3 |
| UTR Pro Tennis Series Zadar | 2021/07/03 08:30 | Josip Krstanovic v Deni Zmak | 5-7,3-5 |
| UTR Pro Tennis Series Zadar | 2021/07/02 08:00 | Deni Zmak v Bozo Barun | 6-2,6-2 |
| UTR Pro Tennis Series Portoroz | 2021/08/21 09:30 | Oleksandr Bielinskyi v Colin Sinclair | 3-6,3-4 |
| 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 |