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| 1st(1st leg) | Athletic Bilbao | - | Real Valladolid | 3:2 (1:1) | ||
| 2nd (2nd leg) | Real Valladolid | - | Athletic Bilbao | 0:1 (0:0) | ||
| 1st(1st leg): 25/01/2005 20:00 | 2nd (2nd leg): 03/02/2005 19:00 | Winner: Athletic Bilbao | ||||
| 1st(1st leg) | Sevilla FC | - | CA Osasuna | 2:1 (1:1) | ||
| 2nd (2nd leg) | CA Osasuna | - | Sevilla FC | 3:1 (1:0) | ||
| 1st(1st leg): 26/01/2005 20:00 | 2nd (2nd leg): 02/02/2005 19:00 | Winner: CA Osasuna | ||||
| 1st(1st leg) | UDA Gramenet | - | Real Betis | 2:2 (1:1) | ||
| 2nd (2nd leg) | Real Betis | - | UDA Gramenet | 4:3 (2:0) | ||
| 1st(1st leg): 27/01/2005 20:00 | 2nd (2nd leg): 02/02/2005 20:00 | Winner: Real Betis | ||||
| 1st(1st leg) | CD Numancia | - | Atlético Madrid | 0:0 (0:0) | ||
| 2nd (2nd leg) | Atlético Madrid | - | CD Numancia | 1:0 (0:0) | ||
| 1st(1st leg): 02/02/2005 19:00 | 2nd (2nd leg): 16/02/2005 20:00 | Winner: Atlético Madrid | ||||
