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