Away History
| 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 |
| ITF Austria F5 | 2017/07/29 07:00 | Charles Broom v Karlo Kajin | 6-0,6-4 |
| ITF Croatia F4 Qual | 2016/03/19 10:30 | Mihnea L.S. Turcu v Karlo Kajin | 1-6,6-2,6-0 |
| ITF Croatia F1 | 2016/02/27 10:30 | Karlo Kajin v Edoardo Lavagno | 0-6,2-6 |