| 2. Ronde | 25.10.2020 | Athletic Club B | - | Racing Santander | 0:1 | ||||
| 5. Ronde | 14.11.2020 | Athletic Club B | - | CD Alavés B | 2:0 | ||||
| 8. Ronde | 05.12.2020 | CD Laredo | - | Athletic Club B | 2:2 |  |
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| 10. Ronde | 19.12.2020 | Real Sociedad B | - | Athletic Club B | 1:2 |  |
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| 9. Ronde | 03.01.2021 | Athletic Club B | - | Barakaldo CF | 3:0 | |
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| 11. Ronde | 10.01.2021 | Athletic Club B | - | Real Unión | 0:0 | ||||
| 12. Ronde | 16.01.2021 | Athletic Club B | - | Arenas de Getxo | 1:1 | |
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| 13. Ronde | 24.01.2021 | Racing Santander | - | Athletic Club B | 1:1 | ||||
| 14. Ronde | 30.01.2021 | Athletic Club B | - | Club Portugalete | 2:0 | |
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