| UTR Pro Tennis Series Bucharest | 2021/11/30 08:00 | Stefan A Andreescu v Ioan Alexandru Chirita | 6-3,6-4 |
| UTR Pro Tennis Series Bucharest | 2021/11/29 11:00 | Stefan A Andreescu v Vasile Antonescu | 7-6,6-0 |
| UTR Pro Tennis Series Brasov | 2021/10/31 09:30 | Vasile Antonescu v Stefan A Andreescu | 4-6,7-6,6-3 |
| UTR Pro Tennis Series Brasov | 2021/10/30 09:30 | Stefan A Andreescu v Alexander Lazov | 6-3,7-5 |
| UTR Pro Tennis Series Brasov | 2021/10/29 08:30 | Stefan A Andreescu v Dan Alexandru Tomescu | 6-3,5-7,1-6 |
| UTR Pro Tennis Series Brasov | 2021/10/28 08:30 | Stefan A Andreescu v Dragos Constantin Ignat | 6-3,6-6 |
| UTR Pro Tennis Series Brasov | 2021/10/27 10:00 | Valentin Vanta v Stefan A Andreescu | 3-6,7-6,5-2 |
| UTR Pro Tennis Series Brasov | 2021/10/26 11:30 | Mihai Razvan Marinescu v Stefan A Andreescu | 2-6,4-6 |
| UTR Pro Tennis Series Bucharest | 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 Portoroz | 2021/08/27 12:00 | Olexiy Kolisnyk v Domen Gostincar | 7-6,6-3 |