| 11. Round | 25/10/2020 | NK BSK Bijelo Brdo | - | NK Osijek II | 0:0 | ||||
| 12. Round | 31/10/2020 | NK Osijek II | - | Hajduk Split II | 1:1 | ||||
| 19. Round | 22/02/2021 | NK Osijek II | - | Hrvatski Dragovoljac | 0:0 | ||||
| 20. Round | 28/02/2021 | NK Croatia Zmijavci | - | NK Osijek II | 1:0 | ||||
| 21. Round | 06/03/2021 | NK Junak Sinj | - | NK Osijek II | 1:1 | ||||
| 25. Round | 10/04/2021 | NK Kustošija | - | NK Osijek II | 1:0 | ||||
| 26. Round | 17/04/2021 | NK Osijek II | - | NK Opatija | 1:0 | ||||
| 28. Round | 24/04/2021 | NK Osijek II | - | NK BSK Bijelo Brdo | 3:0 | ||||
| 27. Round | 28/04/2021 | Dinamo Zagreb II | - | NK Osijek II | 3:0 | ||||
| 29. Round | 02/05/2021 | Hajduk Split II | - | NK Osijek II | 4:3 |
Croatia