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| 1st(1st leg) | Girona FC | - | UD Almería | 3:0 (2:0) | ||
| 2nd (2nd leg) | UD Almería | - | Girona FC | 0:0 (0:0) | ||
| 1st(1st leg): 02/06/2021 20:00 | 2nd (2nd leg): 05/06/2021 20:00 | Winner: Girona FC | ||||
| 1st(1st leg) | Rayo Vallecano | - | CD Leganés | 3:0 (0:0) | ||
| 2nd (2nd leg) | CD Leganés | - | Rayo Vallecano | 1:2 (1:0) | ||
| 1st(1st leg): 03/06/2021 20:00 | 2nd (2nd leg): 06/06/2021 20:00 | Winner: Rayo Vallecano | ||||
