| UTR Pro Tennis Series Zadar | 2021/07/03 07:00 | Matija Pecotic v Roko Horvat | 6-3,5-4 |
| UTR Pro Tennis Series Zadar | 2021/07/02 09:30 | Kiefer, Alexander v Matija Pecotic | 1-6,0-6 |
| UTR Pro Tennis Series Zadar | 2021/07/01 11:00 | Kajin, Karlo v Matija Pecotic | 1-6,2-5 |
| UTR Pro Tennis Series Zadar | 2021/06/30 09:30 | Goetz, Ryan v Matija Pecotic | 6-7,4-5 |
| UTR ProTennis Series Zadar | 2021/06/28 08:00 | Khomich, Aleksei v Matija Pecotic | 1-6,2-5 |
| ITF M25 Grasse | 2021/06/17 14:10 | Matija Pecotic v Briand, Jurgen | 2-6,4-6 |
| ITF M25 Grasse | 2021/06/16 10:30 | Matija Pecotic v Petit, Gabriel | 4-6,6-1,6-2 |
| Challenger - Split | 2021/04/04 10:35 | Matteo Martineau v Matija Pecotic | 6-4,0-6,6-4 |
| UTR Pro Tennis Series Zadar | 2021/07/03 08:30 | Krstanovic, Josip v Zmak, Deni | 5-7,3-5 |
| UTR Pro Tennis Series Zadar | 2021/07/02 08:00 | Zmak, Deni v Barun, Bozo | 6-2,6-2 |
| 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 |