| UTR Pro Tennis Series Zadar | 2021/07/02 09:30 | Alexander Kiefer v Matija Pecotic | 1-6,0-6 |
| UTR Pro Tennis Series Zadar | 2021/07/01 11:00 | Karlo Kajin v Matija Pecotic | 1-6,2-5 |
| UTR Pro Tennis Series Zadar | 2021/06/30 09:30 | Ryan Goetz v Matija Pecotic | 6-7,4-5 |
| UTR Pro Tennis Series Zadar | 2021/06/28 08:00 | Aleksei Khomich v Matija Pecotic | 1-6,2-5 |
| ITF M25 Grasse | 2021/06/17 14:10 | Matija Pecotic v Jurgen Briand | 2-6,4-6 |
| ITF M25 Grasse | 2021/06/16 10:30 | Matija Pecotic v Gabriel Petit | 4-6,6-1,6-2 |
| Challenger Spalato | 2021/04/04 10:35 | Matteo Martineau v Matija Pecotic | 6-4,0-6,6-4 |
| Challenger Zadar | 2021/03/23 09:00 | Nikolas Sanchez Izquierdo v Matija Pecotic | 3-6,6-3,6-2 |
| UTR Pro Tennis Series Zadar | 2021/07/01 08:00 | Roko Horvat v Anatoliy Petrenko | 6-2,6-1 |
| UTR Pro Tennis Series Zadar | 2021/06/30 12:30 | Roko Horvat v Yaraslav Shyla | 5-7,6-3,3-5 |
| UTR Pro Tennis Series Zadar | 2021/06/29 09:30 | Roko Horvat v Elijah Poritzky | 6-0,6-3 |
| UTR Pro Tennis Series Zadar | 2021/06/28 11:00 | Roko Horvat v Rayane Oumaouche | 6-3,5-0 |
| ITF M15 Sibenik | 2021/05/16 10:00 | Roko Horvat v Amaury Raynel | 6-7,3-6 |
| ITF M15 Sibenik | 2021/04/18 08:00 | Lovre Erceg v Roko Horvat | 6-2,3-6,10-7 |
| ITF M15 Opatija | 2021/03/24 09:00 | Roko Horvat v Martin Damm | 1-6,1-6 |
| ITF M15 Rovigno | 2021/03/18 09:00 | Corentin Denolly v Roko Horvat | 6-0,6-1 |