| 16. Round | 07/03/2021 | Atlético Madrid B | - | Rayo Majadahonda | 1:0 | ||||
| 17. Round | 14/03/2021 | Real Madrid Castilla | - | Atlético Madrid B | 3:1 |
| 16. Round | 07/03/2021 | Atlético Madrid B | - | Rayo Majadahonda | 1:0 | ||||
| 17. Round | 14/03/2021 | Real Madrid Castilla | - | Atlético Madrid B | 3:1 |
| Javier Serrano Martínez | |
| Born: | 16.01.2003 |
| Place of birth: |
Madrid, 
Spain |
| Nationality: |
Spain
|
| Height: | 178 cm |
| Weight: | 75 kg |
| Position(s): | Central Midfielder |
| Foot: | right |