| 1. Round | 18/10/2020 | Racing Santander | - | Club Portugalete | 1:1 |  |
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| 2. Round | 25/10/2020 | Athletic Club B | - | Racing Santander | 0:1 | |
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| 3. Round | 01/11/2020 | Racing Santander | - | CD Alavés B | 3:0 | ||||
| 6. Round | 21/11/2020 | CD Laredo | - | Racing Santander | 0:0 | ||||
| 7. Round | 28/11/2020 | Racing Santander | - | Barakaldo CF | 3:0 | ||||
| 4. Round | 02/12/2020 | SD Leioa | - | Racing Santander | 1:0 | ||||
| 10. Round | 20/12/2020 | Arenas de Getxo | - | Racing Santander | 1:1 |  |
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| 11. Round | 10/01/2021 | Racing Santander | - | SD Amorebieta | 0:1 | ||||
| 12. Round | 16/01/2021 | Club Portugalete | - | Racing Santander | 0:1 | ||||
| 13. Round | 24/01/2021 | Racing Santander | - | Athletic Club B | 1:1 | ||||
| 14. Round | 31/01/2021 | CD Alavés B | - | Racing Santander | 2:4 |
Croatia