Stadium: Sport Center Visnjik Court 6 (Clay) Ground: Clay
Referee:
| ITF M25 Bol | 2025/05/20 11:00 | Laurent Lokoli v Karlo Kajin | 6-4,6-0 |
| ITF M15 Rovinj | 2025/03/19 10:00 | Karlo Kajin v Gergely Madarasz | 6-7,3-6 |
| UTR Pro Zadar | 2025/03/02 09:50 | Karlo Kajin v Ivan Denisov | 4-6,3-6 |
| UTR Pro Zadar | 2025/03/01 19:15 | Karlo Kajin v Adam Gabor Szoke | 6-4,6-1 |
| UTR Pro Zadar | 2025/02/28 12:10 | Karlo Kajin v Vojtech Vales | 4-6,6-3,4-6 |
| UTR Pro Zadar | 2025/02/27 18:30 | Karlo Kajin v Gergely Madarasz | 1-6,4-6 |
| UTR Pro Zadar | 2025/02/24 21:40 | Kristian Juhas v Karlo Kajin | 6-2,6-3 |
| ITF M15 Bol | 2024/10/13 09:30 | Karlo Kajin v Nik Mikovic | 2-6,5-7 |