| 1. Round | 18/10/2020 | Las Rozas CF | - | Real Madrid Castilla | 1:2 | ||||
| 2. Round | 25/10/2020 | Real Madrid Castilla | - | Getafe CF B | 1:2 | ||||
| 3. Round | 15/11/2020 | Rayo Majadahonda | - | Real Madrid Castilla | 1:0 | ||||
| 5. Round | 21/11/2020 | Real Madrid Castilla | - | CDA Navalcarnero | 3:1 | ||||
| 4. Round | 25/11/2020 | Real Madrid Castilla | - | Atlético Baleares | 1:1 | ||||
| 6. Round | 29/11/2020 | UD Poblense | - | Real Madrid Castilla | 2:2 |  |
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| 8. Round | 13/12/2020 | Atlético Madrid B | - | Real Madrid Castilla | 1:2 | |
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| 11. Round | 24/01/2021 | Getafe CF B | - | Real Madrid Castilla | 1:0 | ||||
| 9. Round | 03/02/2021 | Real Madrid Castilla | - | UD SS Reyes | 3:1 | |
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| 13. Round | 07/02/2021 | Atlético Baleares | - | Real Madrid Castilla | 2:1 | ||||
| 10. Round | 10/02/2021 | Real Madrid Castilla | - | Las Rozas CF | 3:1 | ||||
| 12. Round | 03/03/2021 | Real Madrid Castilla | - | Rayo Majadahonda | 1:0 | |
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| 16. Round | 07/03/2021 | Inter de Madrid | - | Real Madrid Castilla | 1:2 | ||||
| 17. Round | 14/03/2021 | Real Madrid Castilla | - | Atlético Madrid B | 3:1 | ||||
| 18. Round | 21/03/2021 | UD SS Reyes | - | Real Madrid Castilla | 1:1 |
Spain