| 2. Round | 06/12/2023 | Yeclano Deportivo | - | Rayo Vallecano | 0:2 | ||||
| 3. Round | 06/01/2024 | SD Huesca | - | Rayo Vallecano | 0:2 aet |  |
 |
||
| Round of 16 | 17/01/2024 | Girona FC | - | Rayo Vallecano | 3:1 |
| 2. Round | 06/12/2023 | Yeclano Deportivo | - | Rayo Vallecano | 0:2 | ||||
| 3. Round | 06/01/2024 | SD Huesca | - | Rayo Vallecano | 0:2 aet | |
|
||
| Round of 16 | 17/01/2024 | Girona FC | - | Rayo Vallecano | 3:1 |
| Óscar Valentín Martín Luengo | |
| Born: | 20.08.1994 |
| Place of birth: |
Ajofrín, 
Spain |
| Nationality: |
Spain
|
| Height: | 177 cm |
| Weight: | 72 kg |
| Position(s): | Central Midfielder Defensive Midfielder |
| Foot: | right |
