| 1. Round | 17/12/2020 | UCAM Murcia CF | - | Real Betis | 0:2 | ||||
| 2. Round | 06/01/2021 | UD Mutilvera | - | Real Betis | 1:3 | ||||
| 3. Round | 17/01/2021 | Sporting Gijón | - | Real Betis | 0:2 | ||||
| Round of 16 | 26/01/2021 | Real Betis | - | Real Sociedad | 3:1 aet |  |
 |
| 1. Round | 17/12/2020 | UCAM Murcia CF | - | Real Betis | 0:2 | ||||
| 2. Round | 06/01/2021 | UD Mutilvera | - | Real Betis | 1:3 | ||||
| 3. Round | 17/01/2021 | Sporting Gijón | - | Real Betis | 0:2 | ||||
| Round of 16 | 26/01/2021 | Real Betis | - | Real Sociedad | 3:1 aet | |
|
| Arnaldo Antonio Sanabria Ayala | |
| Born: | 04.03.1996 |
| Place of birth: |
San Lorenzo, 
Paraguay |
| Nationality: |
Paraguay
Spain |
| Height: | 181 cm |
| Weight: | 73 kg |
| Position(s): | Centre Forward |
| Foot: | right |