| 1. Jornada | 13.09.2020 | Mallorca | - | Rayo | 0:1 | ||||
| 2. Jornada | 19.09.2020 | Rayo | - | CE Sabadell | 2:1 | ||||
| 3. Jornada | 27.09.2020 | Ponferradina | - | Rayo | 3:0 | ||||
| 5. Jornada | 10.10.2020 | Tenerife | - | Rayo | 1:0 | ||||
| 6. Jornada | 18.10.2020 | Rayo | - | Espanyol | 1:0 | ||||
| 8. Jornada | 25.10.2020 | Albacete | - | Rayo | 2:1 | ||||
| 11. Jornada | 08.11.2020 | Rayo | - | Almería | 0:1 | ||||
| 12. Jornada | 16.11.2020 | Sporting | - | Rayo | 1:1 |  |
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| 13. Jornada | 21.11.2020 | Rayo | - | CD Castellón | 2:1 | ||||
| 20. Jornada | 02.01.2021 | Rayo | - | Alcorcón | 2:1 | ||||
| 21. Jornada | 19.01.2021 | Mirandés | - | Rayo | 0:2 | ||||
| 29. Jornada | 12.03.2021 | Rayo | - | Zaragoza | 3:2 | |
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| 31. Jornada | 14.04.2021 | Rayo | - | Mirandés | 0:1 | |
España