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| 1st(1st leg) | CE Sabadell | - | Real Madrid | 3:2 | ||
| 2nd (2nd leg) | Real Madrid | - | CE Sabadell | 2:0 aet | ||
| 1st(1st leg): 13/01/1988 | 2nd (2nd leg): 20/01/1988 | Winner: Real Madrid | ||||
| 1st(1st leg) | CD Castellón | - | FC Barcelona | 1:1 | ||
| 2nd (2nd leg) | FC Barcelona | - | CD Castellón | 2:0 | ||
| 1st(1st leg): 13/01/1988 | 2nd (2nd leg): 20/01/1988 | Winner: FC Barcelona | ||||
| 1st(1st leg) | Castilla CF | - | CA Osasuna | 0:0 | ||
| 2nd (2nd leg) | CA Osasuna | - | Castilla CF | 3:1 | ||
| 1st(1st leg): 13/01/1988 | 2nd (2nd leg): 20/01/1988 | Winner: CA Osasuna | ||||
| 1st(1st leg) | Atlético Madrid | - | Real Sociedad | 2:1 | ||
| 2nd (2nd leg) | Real Sociedad | - | Atlético Madrid | 3:1 | ||
| 1st(1st leg): 13/01/1988 | 2nd (2nd leg): 21/01/1988 | Winner: Real Sociedad | ||||
