| 4. Round | 07/11/2020 | Athletic Club B | - | SD Amorebieta | 2:1 | ||||
| 5. Round | 14/11/2020 | SD Amorebieta | - | Real Sociedad B | 2:1 | ||||
| 11. Round | 10/01/2021 | Racing Santander | - | SD Amorebieta | 0:1 | ||||
| 12. Round | 16/01/2021 | CD Laredo | - | SD Amorebieta | 1:3 | ||||
| 13. Round | 23/01/2021 | SD Amorebieta | - | Club Portugalete | 2:1 | ||||
| 15. Round | 06/02/2021 | SD Amorebieta | - | Athletic Club B | 2:3 |
Spain