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| 1st(1st leg) | Lille OSC | - | União Leiria | 0:0 (0:0) | ||
| 2nd (2nd leg) | União Leiria | - | Lille OSC | 0:2 (0:0, 0:0) aet | ||
| 1st(1st leg): 10/08/2004 19:00 | 2nd (2nd leg): 24/08/2004 21:00 | Winner: Lille OSC | ||||
| 1st(1st leg) | FC Schalke 04 | - | Slovan Liberec | 2:1 (2:0) | ||
| 2nd (2nd leg) | Slovan Liberec | - | FC Schalke 04 | 0:1 (0:0) | ||
| 1st(1st leg): 10/08/2004 19:15 | 2nd (2nd leg): 24/08/2004 17:45 | Winner: FC Schalke 04 | ||||
| 1st(1st leg) | Villarreal CF | - | Atlético Madrid | 2:0 (0:0) | ||
| 2nd (2nd leg) | Atlético Madrid | - | Villarreal CF | 1:3 (0:0, 2:0, 2:0) pso | ||
| 1st(1st leg): 10/08/2004 21:00 | 2nd (2nd leg): 24/08/2004 20:45 | Winner: Villarreal CF | ||||
