| 1. Round | 21/07/2019 | Hajduk Split | - | NK Istra 1961 | 2:0 | ||||
| 3. Round | 03/08/2019 | NK Istra 1961 | - | NK Varaždin | 3:1 | ||||
| 4. Round | 10/08/2019 | Lokomotiva Zagreb | - | NK Istra 1961 | 4:1 | ||||
| 6. Round | 25/08/2019 | HNK Gorica | - | NK Istra 1961 | 1:1 | ||||
| 19. Round | 15/12/2019 | Hajduk Split | - | NK Istra 1961 | 2:1 |  |
Croatia