| 1. Journée | 14.08.2021 | HNK Cibalia | - | NK Opatija | 2:2 |  |
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| 2. Journée | 21.08.2021 | NK Opatija | - | NK Inter Zaprešić | 3:0 | ||||
| 3. Journée | 28.08.2021 | NK Kustošija | - | NK Opatija | 0:0 | ||||
| 4. Journée | 10.09.2021 | NK Opatija | - | NK BSK Bijelo Brdo | 0:0 | |
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| 5. Journée | 15.09.2021 | Dinamo Zagreb II | - | NK Opatija | 2:1 | |
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| 7. Journée | 26.09.2021 | NK Croatia Zmijavci | - | NK Opatija | 3:0 | |
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| 8. Journée | 02.10.2021 | NK Osijek II | - | NK Opatija | 0:2 |
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