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| 1st(1st leg) | CD Logroñés | - | Sporting Gijón | 2:0 (0:0) | ||
| 2nd (2nd leg) | Sporting Gijón | - | CD Logroñés | 3:0 (1:0, 2:0) aet | ||
| 1st(1st leg): 12/06/1991 20:00 | 2nd (2nd leg): 16/06/1991 18:30 | Winner: Sporting Gijón | ||||
| 1st(1st leg) | Sevilla FC | - | FC Barcelona | 0:4 (0:3) | ||
| 2nd (2nd leg) | FC Barcelona | - | Sevilla FC | 3:0 (0:0) | ||
| 1st(1st leg): 12/06/1991 20:00 | 2nd (2nd leg): 15/06/1991 20:00 | Winner: FC Barcelona | ||||
| 1st(1st leg) | Valencia CF | - | RCD Mallorca | 1:0 (0:0) | ||
| 2nd (2nd leg) | RCD Mallorca | - | Valencia CF | 3:1 (2:1) | ||
| 1st(1st leg): 12/06/1991 20:00 | 2nd (2nd leg): 16/06/1991 19:00 | Winner: RCD Mallorca | ||||
| 1st(1st leg) | Real Valladolid | - | Atlético Madrid | 0:2 (0:2) | ||
| 2nd (2nd leg) | Atlético Madrid | - | Real Valladolid | 0:1 (0:0) | ||
| 1st(1st leg): 13/06/1991 19:30 | 2nd (2nd leg): 16/06/1991 20:00 | Winner: Atlético Madrid | ||||
