| 16. Round | 17/12/2023 | SD Gernika | - | Athletic Club B | 1:1 | ||||
| 19. Round | 21/01/2024 | Utebo FC | - | Athletic Club B | 0:0 | ||||
| 24. Round | 25/02/2024 | Real Zaragoza B | - | Athletic Club B | 2:2 |  |
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| 25. Round | 02/03/2024 | Athletic Club B | - | UD Mutilvera | 3:1 | ||||
| 27. Round | 16/03/2024 | Athletic Club B | - | Arenas de Getxo | 2:1 |
Spain