3. Round | 01/11/2020 | Club Portugalete | - | Athletic Bilbao B | 2:3 | ||||
4. Round | 07/11/2020 | Athletic Bilbao B | - | SD Amorebieta | 2:1 | ||||
5. Round | 14/11/2020 | Athletic Bilbao B | - | CD Alavés B | 2:0 | ||||
6. Round | 22/11/2020 | SD Leioa | - | Athletic Bilbao B | 1:1 | ||||
10. Round | 19/12/2020 | Real Sociedad B | - | Athletic Bilbao B | 1:2 | ||||
9. Round | 03/01/2021 | Athletic Bilbao B | - | Barakaldo CF | 3:0 | ||||
11. Round | 10/01/2021 | Athletic Bilbao B | - | Real Unión | 0:0 | ||||
12. Round | 16/01/2021 | Athletic Bilbao B | - | Arenas de Getxo | 1:1 | ||||
13. Round | 24/01/2021 | Racing Santander | - | Athletic Bilbao B | 1:1 | ||||
14. Round | 30/01/2021 | Athletic Bilbao B | - | Club Portugalete | 2:0 | ||||
15. Round | 06/02/2021 | SD Amorebieta | - | Athletic Bilbao B | 2:3 | ||||
16. Round | 14/02/2021 | CD Alavés B | - | Athletic Bilbao B | 0:2 | ||||
19. Round | 06/03/2021 | Athletic Bilbao B | - | CD Laredo | 2:1 | ||||
20. Round | 14/03/2021 | Barakaldo CF | - | Athletic Bilbao B | 3:1 | ||||
17. Round | 17/03/2021 | Athletic Bilbao B | - | SD Leioa | 4:0 | ||||
21. Round | 21/03/2021 | Athletic Bilbao B | - | Real Sociedad B | 1:2 |