| 3. Jornada | 12.08.2018 | NK Osijek | - | NK Istra 1961 | 3:0 | ||||
| 4. Jornada | 18.08.2018 | NK Istra 1961 | - | Lokomotiva Zagreb | 1:2 | ||||
| 5. Jornada | 26.08.2018 | HNK Rijeka | - | NK Istra 1961 | 3:3 |  |
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| 7. Jornada | 14.09.2018 | NK Inter Zaprešić | - | NK Istra 1961 | 1:2 | |
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| 8. Jornada | 23.09.2018 | NK Istra 1961 | - | Hajduk Split | 2:4 | ||||
| 9. Jornada | 01.10.2018 | NK Rudeš | - | NK Istra 1961 | 0:3 | |
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| 11. Jornada | 20.10.2018 | NK Istra 1961 | - | Dinamo Zagreb | 1:4 | |
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| 12. Jornada | 27.10.2018 | NK Istra 1961 | - | NK Osijek | 1:1 | ||||
| 13. Jornada | 03.11.2018 | Lokomotiva Zagreb | - | NK Istra 1961 | 1:0 | ||||
| 14. Jornada | 11.11.2018 | NK Istra 1961 | - | HNK Rijeka | 1:2 | |
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| 15. Jornada | 24.11.2018 | HNK Gorica | - | NK Istra 1961 | 0:2 | ||||
| 16. Jornada | 30.11.2018 | NK Istra 1961 | - | NK Inter Zaprešić | 0:2 |  |
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| 18. Jornada | 16.12.2018 | NK Istra 1961 | - | NK Rudeš | 1:0 |
Argentina