| 3. Jornada | 01.11.2020 | Club Portugalete | - | Bilbao Athletic | 2:3 | ||||
| 4. Jornada | 07.11.2020 | Alavés B | - | Club Portugalete | 1:0 | ||||
| 5. Jornada | 15.11.2020 | Club Portugalete | - | SD Leioa | 1:0 | ||||
| 7. Jornada | 29.11.2020 | Club Portugalete | - | CD Laredo | 0:1 | ||||
| 9. Jornada | 12.12.2020 | Club Portugalete | - | Real Sociedad B | 1:1 |  |
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| 10. Jornada | 20.12.2020 | Real Unión | - | Club Portugalete | 2:1 | ||||
| 11. Jornada | 10.01.2021 | Club Portugalete | - | Arenas de Getxo | 0:1 | ||||
| 12. Jornada | 16.01.2021 | Club Portugalete | - | Real Racing | 0:1 | ||||
| 13. Jornada | 23.01.2021 | SD Amorebieta | - | Club Portugalete | 2:1 | ||||
| 14. Jornada | 30.01.2021 | Bilbao Athletic | - | Club Portugalete | 2:0 | |
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| 15. Jornada | 06.02.2021 | Club Portugalete | - | Alavés B | 0:0 | ||||
| 18. Jornada | 28.02.2021 | CD Laredo | - | Club Portugalete | 0:1 | ||||
| 19. Jornada | 06.03.2021 | Club Portugalete | - | Barakaldo CF | 2:0 | ||||
| 16. Jornada | 10.03.2021 | SD Leioa | - | Club Portugalete | 1:2 | ||||
| 20. Jornada | 14.03.2021 | Real Sociedad B | - | Club Portugalete | 2:0 | ||||
| 21. Jornada | 21.03.2021 | Club Portugalete | - | Real Unión | 2:0 | |
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| 22. Jornada | 28.03.2021 | Arenas de Getxo | - | Club Portugalete | 1:0 |
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