| 1. Round | 18/10/2020 | Getafe CF B | - | Rayo Majadahonda | 1:2 | ||||
| 2. Round | 25/10/2020 | Rayo Majadahonda | - | Atlético Baleares | 2:0 | ||||
| 4. Round | 08/11/2020 | CDA Navalcarnero | - | Rayo Majadahonda | 0:0 | ||||
| 8. Round | 13/12/2020 | UD SS Reyes | - | Rayo Majadahonda | 1:0 | ||||
| 11. Round | 24/01/2021 | Atlético Baleares | - | Rayo Majadahonda | 3:0 | ||||
| 9. Round | 28/02/2021 | Rayo Majadahonda | - | Las Rozas CF | 0:0 | ||||
| 12. Round | 03/03/2021 | Real Madrid Castilla | - | Rayo Majadahonda | 1:0 | ||||
| 16. Round | 07/03/2021 | Atlético Madrid B | - | Rayo Majadahonda | 1:0 | ||||
| 17. Round | 14/03/2021 | Rayo Majadahonda | - | UD SS Reyes | 2:1 | ||||
| 18. Round | 21/03/2021 | Las Rozas CF | - | Rayo Majadahonda | 2:1 |  |
Spain