| UTR Pro Tennis Series Bucarest | 2021/12/01 14:00 | Stefan A Andreescu v Olexiy Kolisnyk | 6-2,2-6,6-4 |
| UTR Pro Tennis Series Bucarest | 2021/11/30 14:50 | Vasile Antonescu v Olexiy Kolisnyk | 7-6,6-4 |
| UTR Pro Tennis Series Zadar | 2021/11/20 14:46 | Olexiy Kolisnyk v Egor Matvievici | 6-3,4-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/11/19 15:03 | Olexiy Kolisnyk v Vladimir Popov | 6-0,6-4 |
| UTR Pro Tennis Series Zadar | 2021/11/18 11:30 | Olexiy Kolisnyk v Denis Parshutin | 7-6,6-2 |
| UTR Pro Tennis Series Zadar | 2021/11/16 11:44 | Olexiy Kolisnyk v Alexander Chepik | 3-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/11/15 12:00 | Olexiy Kolisnyk v Christos Keisidis | 7-5,3-6,4-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/29 08:00 | Olexiy Kolisnyk v Deni Zmak | 4-6,6-2,6-3 |
| UTR Pro Tennis Series Bucarest | 2021/11/30 08:00 | Stefan A Andreescu v Ioan Alexandru Chirita | 6-3,6-4 |
| UTR Pro Tennis Series Bucarest | 2021/11/29 09:30 | Ioan Alexandru Chirita v Nicolae Frunza | 2-6,2-5 |
| UTR Pro Tennis Series Brasov | 2021/10/30 08:00 | Bogdan Borza v Ioan Alexandru Chirita | 6-4,3-6,5-3 |
| UTR Pro Tennis Series Brasov | 2021/10/29 13:30 | Edris Fetisleam v Ioan Alexandru Chirita | 6-4,6-1 |
| UTR Pro Tennis Series Brasov | 2021/10/28 11:30 | Roman Boychuk v Ioan Alexandru Chirita | 4-6,2-5 |
| UTR Pro Tennis Series Brasov | 2021/10/26 08:30 | Vasile Antonescu v Ioan Alexandru Chirita | 1-6,3-6 |
| UTR Pro Tennis Series Brasov | 2021/10/25 10:00 | Ioan Alexandru Chirita v Vladimir Popov | 6-2,6-2 |
| UTR Pro Tennis Series Sofia | 2021/09/04 07:00 | Ioan Alexandru Chirita v Volodymyr Uzhylovskyi | 4-3 |