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| 1. Round | ||||||
|---|---|---|---|---|---|---|
| 07/04/2021 | 17:00 | Athletic Bilbao B | - | CD Calahorra | 2:1 (1:1) | |
| 17:30 | Real Sociedad B | - | SD Logroñés | 3:0 (1:0) | ||
| 18:00 | SD Amorebieta | - | CD Tudelano | 3:0 (1:0) | ||
| 2. Round | ||||||
| 11/04/2021 | 11:00 | CD Tudelano | - | Athletic Bilbao B | 1:4 (0:1) | |
| 16:00 | SD Logroñés | - | SD Amorebieta | 0:0 (0:0) | ||
| 16:00 | CD Calahorra | - | Real Sociedad B | 1:2 (1:0) | ||
| 3. Round | ||||||
| 17/04/2021 | 14:45 | Athletic Bilbao B | - | SD Logroñés | 2:0 (1:0) | |
| 15:30 | SD Amorebieta | - | CD Calahorra | 0:0 (0:0) | ||
| 18/04/2021 | 18:00 | Real Sociedad B | - | CD Tudelano | 3:2 (0:1) | |
| 4. Round | ||||||
| 25/04/2021 | 11:00 | CD Tudelano | - | SD Amorebieta | 1:2 (0:0) | |
| 16:00 | SD Logroñés | - | Real Sociedad B | 1:1 (0:0) | ||
| 16:00 | CD Calahorra | - | Athletic Bilbao B | 2:1 (1:0) | ||
| 5. Round | ||||||
| 01/05/2021 | 14:45 | SD Amorebieta | - | SD Logroñés | 3:1 (3:1) | |
| 16:00 | Athletic Bilbao B | - | CD Tudelano | 3:1 (1:1) | ||
| 02/05/2021 | 18:30 | Real Sociedad B | - | CD Calahorra | 0:1 (0:0) | |
| 6. Round | ||||||
| 09/05/2021 | 11:00 | CD Calahorra | - | SD Amorebieta | 0:0 (0:0) | |
| 11:00 | CD Tudelano | - | Real Sociedad B | 1:2 (1:1) | ||
| 11:00 | SD Logroñés | - | Athletic Bilbao B | 1:0 (1:0) | ||
