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| 1st(1st leg) | Deportivo La Coruña | - | UD Las Palmas | 2:1 (1:1) | ||
| 2nd (2nd leg) | UD Las Palmas | - | Deportivo La Coruña | 1:3 (1:0, 2:1) pso | ||
| 1st(1st leg): 13/06/2021 11:00 | 2nd (2nd leg): 20/06/2021 11:00 | Winner: Deportivo La Coruña | ||||
| 1st(1st leg) | Málaga CF | - | Athletic Bilbao | 2:0 (0:0) | ||
| 2nd (2nd leg) | Athletic Bilbao | - | Málaga CF | 3:3 (1:1) | ||
| 1st(1st leg): 13/06/2021 11:00 | 2nd (2nd leg): 19/06/2021 17:00 | Winner: Málaga CF | ||||
| 1st(1st leg) | Real Madrid | - | Atlético Madrid | 2:1 (0:1) | ||
| 2nd (2nd leg) | Atlético Madrid | - | Real Madrid | 1:2 (0:1) | ||
| 1st(1st leg): 13/06/2021 18:00 | 2nd (2nd leg): 20/06/2021 19:00 | Winner: Real Madrid | ||||
| 1st(1st leg) | Levante UD | - | FC Barcelona | 1:1 (0:1) | ||
| 2nd (2nd leg) | FC Barcelona | - | Levante UD | 2:1 (0:0) | ||
| 1st(1st leg): 16/06/2021 17:00 | 2nd (2nd leg): 20/06/2021 18:00 | Winner: FC Barcelona | ||||
