| UTR Pro Tennis Series Zadar | 2021/06/29 08:00 | Arthus De La Bassetiere v Vito Tonejc | 6-7,2-6 |
| UTR Pro Tennis Series Zadar | 2021/06/28 09:30 | Arthus De La Bassetiere v Ihor Dudun | 3-6,6-1,6-1 |
| UTR Pro Tennis Series Zadar | 2021/06/29 08:00 | Ihor Dudun v Deni Zmak | 3-6,2-6 |
| ITF M15 Rovinj | 2021/03/16 08:55 | Matteo Arnaldi v Deni Zmak | 6-3,6-4 |
| ITF M15 Rovinj | 2021/03/15 11:30 | Deni Zmak v Alen Rogic-Hadzalic | 6-3,7-6 |
| ITF M15 Rovinj | 2021/03/14 08:30 | Deni Zmak v Alessandro Ragazzi | 6-3,7-6 |
| Adriatic Tennis Series | 2020/06/16 10:00 | Danilo Petrovic v Deni Zmak | 6-2,6-4 |
| Adriatic Tennis Series | 2020/06/15 09:30 | Marino Jakic v Deni Zmak | 2-6,4-5 |
| ITF M15 Porec | 2020/03/11 09:00 | Juan Pablo Paz v Deni Zmak | 6-2,3-6,7-6 |
| ITF M15 Porec | 2020/03/10 09:00 | Oleksandr Ovcharenko v Deni Zmak | 7-6,2-6,10-12 |