| UTR Pro Tennis Series Zadar | 2021/11/16 13:00 | Deni Zmak v Graham Maassen | 4-6,6-1,6-2 |
| UTR Pro Tennis Series Zadar | 2021/11/15 09:00 | Jose A R Rodriguez v Deni Zmak | 1-6,1-5 |
| UTR Pro Tennis Series Copenhagen | 2021/10/23 08:30 | Simon Friis Soendergaard v Deni Zmak | 5-7,1-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/21 07:00 | Deni Zmak v Albert P Hansen | 6-1,6-1 |
| UTR Pro Tennis Series Copenhagen | 2021/10/20 08:30 | Deni Zmak v Jose Antonio Rodriguez Rodriguez | 6-1,5-2 |
| UTR Pro Tennis Series Copenhagen | 2021/10/19 07:00 | Deni Zmak v Arslan Temirhanov | 7-5,6-4 |
| UTR Pro Tennis Series Copenhagen | 2021/10/18 11:30 | Deni Zmak v Maxim Landa | 6-0,5-1 |
| UTR Pro Tennis Series Zadar | 2021/10/03 09:30 | Deni Zmak v Alen Rogic-Hadzalic | 6-4,7-5 |
| UTR Pro Tennis Series Zadar | 2021/11/16 10:30 | Jose A R Rodriguez v Alexander Lazov | 1-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/11/14 15:20 | Graham Maassen v Alexander Lazov | 6-2,6-4 |
| 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 10:00 | Yurii Dzhavakian v Alexander Lazov | 6-2,6-4 |
| UTR Pro Tennis Series Brasov | 2021/10/28 07:00 | Vlad Andrei Dancu v Alexander Lazov | 6-3,7-5 |
| UTR Pro Tennis Series Brasov | 2021/10/27 08:30 | Tudor Vlad Vasilache v Alexander Lazov | 6-2,3-6,2-6 |
| UTR Pro Tennis Series Brasov | 2021/10/25 11:30 | Martin Dimitrov v Alexander Lazov | 5-7,4-6 |
| UTR Pro Tennis Series Nis | 2021/10/10 17:00 | Ivan Liutarevich v Alexander Lazov | 6-4,6-4 |