| 2. Round | 11/04/2021 | CD Calahorra | - | Real Sociedad B | 1:2 | ||||
| 3. Round | 18/04/2021 | Real Sociedad B | - | CD Tudelano | 3:2 |  |
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| 4. Round | 25/04/2021 | SD Logroñés | - | Real Sociedad B | 1:1 | |
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| 5. Round | 02/05/2021 | Real Sociedad B | - | CD Calahorra | 0:1 |
| 2. Round | 11/04/2021 | CD Calahorra | - | Real Sociedad B | 1:2 | ||||
| 3. Round | 18/04/2021 | Real Sociedad B | - | CD Tudelano | 3:2 | |
|||
| 4. Round | 25/04/2021 | SD Logroñés | - | Real Sociedad B | 1:1 | |
|||
| 5. Round | 02/05/2021 | Real Sociedad B | - | CD Calahorra | 0:1 |
| Aritz Aldasoro Sarriegi | |
| Born: | 05.06.1999 |
| Place of birth: |
Beasain, 
Spain |
| Nationality: |
Spain
|
| Height: | 176 cm |
| Weight: | 70 kg |
| Position(s): | Central Midfielder Offensive Midfielder |
| Foot: | right |