| UTR Pro Tennis Series Zadar | 2021/07/01 12:30 | Zmak, Deni v Vito Tonejc | 6-3,5-2 |
| UTR Pro Tennis Series Zadar | 2021/06/30 11:00 | Arthus De La Bassetiere v Zmak, Deni | 2-6,3-5 |
| UTR Pro Tennis Series Zadar | 2021/06/29 08:00 | Ihor Dudun v Zmak, Deni | 3-6,2-6 |
| ITF - M15 Rovinj | 2021/03/16 08:55 | Matteo Arnaldi v Zmak, Deni | 6-3,6-4 |
| ITF - M15 Rovinj | 2021/03/15 11:30 | Zmak, Deni v Rogic Hadzalic, Alen | 6-3,7-6 |
| ITF - M15 Rovinj | 2021/03/14 08:30 | Zmak, Deni v Ragazzi, Alessandro | 6-3,7-6 |
| Adriatic Tennis Series | 2020/06/16 10:00 | Petrovic, Danilo v Zmak, Deni | 6-2,6-4 |
| Adriatic Tennis Series | 2020/06/15 09:30 | Marino Jakic v Zmak, Deni | 2-6,4-5 |
| UTR Pro Tennis Series Zadar | 2021/07/01 14:00 | Arthus De La Bassetiere v Barun, Bozo | 7-6,6-2 |
| UTR Pro Tennis Series Zadar | 2021/06/30 12:00 | Ihor Dudun v Barun, Bozo | 1-6,1-5 |
| UTR ProTennis Series Zadar | 2021/06/28 09:30 | Vito Tonejc v Barun, Bozo | 6-3,3-6,5-3 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/06/02 10:50 | Barun, Bozo v Matheus P De Almeida | 3-6,2-6 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/06/01 10:30 | Barun, Bozo v Galik, Matej | 6-3,4-6,10-7 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/05/31 12:00 | Barun, Bozo v Nicolas Zanellato | 6-3,6-1 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/05/31 08:00 | Barun, Bozo v Randjelovic, Ivan | 6-0,6-2 |
| ITF - M25 Kiseljak | 2021/05/27 09:00 | Barun, Bozo v Aldin Setkic | 2-6,4-6 |