| 1. Round | 18/10/2020 | CD Marino | - | RB Linense | 0:1 | ||||
| 3. Round | 01/11/2020 | Algeciras CF | - | CD Marino | 2:1 | ||||
| 4. Round | 08/11/2020 | CD Marino | - | UD Tamaraceite | 0:0 | ||||
| 5. Round | 22/11/2020 | Cádiz CF B | - | CD Marino | 3:1 | ||||
| 6. Round | 29/11/2020 | CD Marino | - | Atlético Sanluqueño CF | 0:1 | ||||
| 7. Round | 05/12/2020 | Recreativo Huelva | - | CD Marino | 6:0 | ||||
| 8. Round | 12/12/2020 | CD Marino | - | UD Las Palmas B | 0:0 | ||||
| 9. Round | 10/01/2021 | San Fernando CD | - | CD Marino | 2:3 | ||||
| 10. Round | 16/01/2021 | RB Linense | - | CD Marino | 1:0 | ||||
| 11. Round | 23/01/2021 | CD Marino | - | Marbella FC | 0:3 | ||||
| 13. Round | 07/02/2021 | UD Tamaraceite | - | CD Marino | 2:1 | ||||
| 14. Round | 13/02/2021 | CD Marino | - | Cádiz CF B | 0:0 | ||||
| 15. Round | 21/02/2021 | Atlético Sanluqueño CF | - | CD Marino | 2:0 | ||||
| 17. Round | 14/03/2021 | UD Las Palmas B | - | CD Marino | 2:1 | ||||
| 18. Round | 21/03/2021 | CD Marino | - | San Fernando CD | 0:1 |  |
Spain