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| 1st(1st leg) | CD Alavés | - | Real Madrid | 1:0 (0:0) | ||
| 2nd (2nd leg) | Real Madrid | - | CD Alavés | 2:1 (1:1) | ||
| 1st(1st leg): 13/01/1998 20:30 | 2nd (2nd leg): 21/01/1998 20:00 | Winner: CD Alavés | ||||
| 1st(1st leg) | Real Sociedad | - | Real Betis | 0:2 (0:1) | ||
| 2nd (2nd leg) | Real Betis | - | Real Sociedad | 1:1 (1:0) | ||
| 1st(1st leg): 14/01/1998 19:15 | 2nd (2nd leg): 21/01/1998 20:30 | Winner: Real Betis | ||||
| 1st(1st leg) | CA Osasuna | - | Deportivo La Coruña | 0:1 (0:0) | ||
| 2nd (2nd leg) | Deportivo La Coruña | - | CA Osasuna | 2:1 (0:0) | ||
| 1st(1st leg): 14/01/1998 19:30 | 2nd (2nd leg): 21/01/1998 19:45 | Winner: Deportivo La Coruña | ||||
| 1st(1st leg) | Real Zaragoza | - | Atlético Madrid | 2:0 (1:0) | ||
| 2nd (2nd leg) | Atlético Madrid | - | Real Zaragoza | 2:1 (2:0) | ||
| 1st(1st leg): 14/01/1998 19:45 | 2nd (2nd leg): 20/01/1998 20:30 | Winner: Real Zaragoza | ||||
| 1st(1st leg) | Real Valladolid | - | CP Mérida | 1:1 (0:0) | ||
| 2nd (2nd leg) | CP Mérida | - | Real Valladolid | 3:1 (1:1) | ||
| 1st(1st leg): 14/01/1998 20:00 | 2nd (2nd leg): 21/01/1998 20:00 | Winner: CP Mérida | ||||
| 1st(1st leg) | CF Extremadura | - | Athletic Club | 2:0 (0:0) | ||
| 2nd (2nd leg) | Athletic Club | - | CF Extremadura | 4:1 (1:1) | ||
| 1st(1st leg): 14/01/1998 20:00 | 2nd (2nd leg): 21/01/1998 19:30 | Winner: Athletic Club | ||||
| 1st(1st leg) | RCD Mallorca | - | RC Celta | 1:0 (0:0) | ||
| 2nd (2nd leg) | RC Celta | - | RCD Mallorca | 2:1 (1:0) | ||
| 1st(1st leg): 14/01/1998 20:15 | 2nd (2nd leg): 21/01/1998 20:00 | Winner: RCD Mallorca | ||||
| 1st(1st leg) | FC Barcelona | - | Valencia CF | 2:1 (1:1) | ||
| 2nd (2nd leg) | Valencia CF | - | FC Barcelona | 1:3 (0:1) | ||
| 1st(1st leg): 15/01/1998 20:30 | 2nd (2nd leg): 22/01/1998 20:30 | Winner: FC Barcelona | ||||
