| 8. Jornada | 30.09.2020 | Hrvatski Dragovoljac | - | NK Opatija | 1:1 |  |
|||
| 9. Jornada | 03.10.2020 | NK Opatija | - | NK Osijek II | 1:1 | ||||
| 10. Jornada | 17.10.2020 | NK Junak Sinj | - | NK Opatija | 0:2 | |
|||
| 12. Jornada | 30.10.2020 | NK Međimurje | - | NK Opatija | 3:0 |  |
|||
| 14. Jornada | 21.11.2020 | NK Kustošija | - | NK Opatija | 2:1 | ||||
| 13. Jornada | 25.11.2020 | NK Opatija | - | NK Inter Zaprešić | 3:2 | ||||
| 15. Jornada | 28.11.2020 | NK Opatija | - | NK Croatia Zmijavci | 2:3 | ||||
| 16. Jornada | 05.12.2020 | NK Opatija | - | Dinamo Zagreb II | 2:1 | ||||
| 17. Jornada | 13.12.2020 | NK BSK Bijelo Brdo | - | NK Opatija | 1:1 |
Croacia