| 20. Jornada | 27.02.2021 | NK Solin | - | NK Opatija | 1:1 | ||||
| 22. Jornada | 14.03.2021 | HNK Cibalia | - | NK Opatija | 2:0 | ||||
| 24. Jornada | 02.04.2021 | HNK Orijent Rijeka | - | NK Opatija | 4:1 | ||||
| 29. Jornada | 01.05.2021 | NK Opatija | - | NK Međimurje | 1:1 | ||||
| 30. Jornada | 07.05.2021 | NK Inter Zaprešić | - | NK Opatija | 3:0 | ||||
| 32. Jornada | 16.05.2021 | NK Croatia Zmijavci | - | NK Opatija | 1:3 |
Croacia