| UTR Pro Tennis Series - Portoroz | 2021/08/21 09:30 | Olexiy Kolisnyk v Deni Zmak | 4-6,6-7 |
| UTR Pro Tennis Series - Portoroz | 2021/08/27 12:00 | Olexiy Kolisnyk v Domen Gostincar | 7-6,6-3 |
| UTR Pro Tennis Series - Portoroz | 2021/08/25 10:00 | Olexiy Kolisnyk v Volodymyr Uzhylovskyi | 6-1,6-1 |
| UTR Pro Tennis Series - Portoroz | 2021/08/25 07:00 | Olexiy Kolisnyk v Vladan Tadic | 6-2,3-6,2-1 |
| 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 - Portoroz | 2021/08/28 07:00 | Egor Novikov v Deni Zmak | 2-6,7-6,1-5 |
| UTR Pro Tennis Series - Portoroz | 2021/08/26 08:30 | Denis Parshutin v Deni Zmak | 3-6,0-6 |
| UTR Pro Tennis Series - Portoroz | 2021/08/25 13:00 | Tilen Zitnik v Deni Zmak | 3-6,1-6 |
| UTR Pro Tennis Series - Portoroz | 2021/08/24 07:00 | Deni Zmak v Timur Maulenov | 7-6,5-1 |
| UTR Pro Tennis Series - Portoroz | 2021/08/22 10:00 | Deni Zmak v Oleksandr Bielinskyi | 6-2,7-6 |
| 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 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 |