| 1. Round | 15/08/2021 | Sevilla FC | - | Rayo Vallecano | 3:0 | ||||
| 2. Round | 22/08/2021 | Real Sociedad | - | Rayo Vallecano | 1:0 | ||||
| 3. Round | 29/08/2021 | Rayo Vallecano | - | Granada CF | 4:0 | ||||
| 4. Round | 11/09/2021 | Levante UD | - | Rayo Vallecano | 1:1 |
| 1. Round | 15/08/2021 | Sevilla FC | - | Rayo Vallecano | 3:0 | ||||
| 2. Round | 22/08/2021 | Real Sociedad | - | Rayo Vallecano | 1:0 | ||||
| 3. Round | 29/08/2021 | Rayo Vallecano | - | Granada CF | 4:0 | ||||
| 4. Round | 11/09/2021 | Levante UD | - | Rayo Vallecano | 1:1 |
| Martín Merquelanz Castellanos | |
| Born: | 12.06.1995 |
| Place of birth: |
Irún, 
Spain |
| Nationality: |
Spain
|
| Height: | 176 cm |
| Weight: | 72 kg |
| Position(s): | Left Midfielder Right Midfielder |
| Foot: | left |