| 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 | ||||
| 3. Round | 15/11/2020 | Rayo Majadahonda | - | Real Madrid Castilla | 1:0 | ||||
| 5. Round | 22/11/2020 | Rayo Majadahonda | - | UD Poblense | 2:1 | ||||
| 6. Round | 29/11/2020 | Inter de Madrid | - | Rayo Majadahonda | 1:2 | ||||
| 7. Round | 06/12/2020 | Rayo Majadahonda | - | Atlético Madrid B | 1:0 | ||||
| 8. Round | 13/12/2020 | UD SS Reyes | - | 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