| UTR Pro Tennis Series Zadar | 2021/06/30 09:30 | Karlo Kajin v Alexander Kiefer | 3-6,1-6 |
| UTR Pro Tennis Series Zadar | 2021/06/29 12:30 | Karlo Kajin v Aleksei Khomich | 6-4,3-6,2-6 |
| UTR ProTennis Series Zadar | 2021/06/28 08:00 | Karlo Kajin v Ryan Goetz | 1-6,1-5 |
| ITF Croatia F3 | 2018/03/19 12:30 | Tommaso Gabrieli v Karlo Kajin | 7-6,6-4 |
| ITF Croatia F3 | 2018/03/18 10:30 | Marco De Rosa v Karlo Kajin | 6-7,6-2,2-6 |
| ITF Croatia F2 | 2018/03/12 08:00 | Andres Gabriel Ciurletti v Karlo Kajin | 6-3,6-3 |
| ITF Croatia F2 | 2018/03/10 09:00 | Karlo Kajin v Justin Schlageter | 3-6,6-2,6-4 |
| ITF Croatia F1 | 2018/03/08 09:00 | Pascal Meis v Karlo Kajin | 6-3,6-1 |
| UTR Pro Tennis Series Zadar | 2021/06/30 09:30 | Ryan Goetz v Matija Pecotic | 6-7,4-5 |
| UTR ProTennis 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 Split | 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 |
| Challenger Biella Qual | 2021/03/14 13:35 | Daniel Masur v Matija Pecotic | 6-0,6-3 |
| Challenger St. Petersburg | 2021/03/09 08:20 | Jiri Lehecka v Matija Pecotic | 6-2,7-6 |