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| 1st(1st leg) | Dinamo Kiev | - | Dinamo Zagreb | 3:1 (2:1) | ||
| 2nd (2nd leg) | Dinamo Zagreb | - | Dinamo Kiev | 0:2 (0:0) | ||
| 1st(1st leg): 12/08/2003 18:00 | 2nd (2nd leg): 27/08/2003 19:45 | Winner: Dinamo Kiev | ||||
| 1st(1st leg) | Grazer AK | - | AFC Ajax | 1:1 (0:0) | ||
| 2nd (2nd leg) | AFC Ajax | - | Grazer AK | 2:1 (1:1, 1:1) aet | ||
| 1st(1st leg): 12/08/2003 19:30 | 2nd (2nd leg): 27/08/2003 19:30 | Winner: AFC Ajax | ||||
| 1st(1st leg) | RC Celta | - | Slavia Praha | 3:0 (1:0) | ||
| 2nd (2nd leg) | Slavia Praha | - | RC Celta | 2:0 (2:0) | ||
| 1st(1st leg): 12/08/2003 20:30 | 2nd (2nd leg): 27/08/2003 19:45 | Winner: RC Celta | ||||
| 1st(1st leg) | Shakhtar Donetsk | - | Lokomotiv Moskva | 1:0 (0:0) | ||
| 2nd (2nd leg) | Lokomotiv Moskva | - | Shakhtar Donetsk | 3:1 (2:0) | ||
| 1st(1st leg): 13/08/2003 17:00 | 2nd (2nd leg): 27/08/2003 17:00 | Winner: Lokomotiv Moskva | ||||
| 1st(1st leg) | Vardar Skopje | - | AC Sparta Praha | 2:3 (0:2) | ||
| 2nd (2nd leg) | AC Sparta Praha | - | Vardar Skopje | 2:2 (1:1) | ||
| 1st(1st leg): 13/08/2003 19:00 | 2nd (2nd leg): 26/08/2003 16:00 | Winner: AC Sparta Praha | ||||
| 1st(1st leg) | MŠK Žilina | - | Chelsea FC | 0:2 (0:1) | ||
| 2nd (2nd leg) | Chelsea FC | - | MŠK Žilina | 3:0 (1:0) | ||
| 1st(1st leg): 13/08/2003 19:00 | 2nd (2nd leg): 26/08/2003 19:45 | Winner: Chelsea FC | ||||
| 1st(1st leg) | Galatasaray | - | CSKA Sofia | 3:0 (3:0) | ||
| 2nd (2nd leg) | CSKA Sofia | - | Galatasaray | 0:3 (0:1) | ||
| 1st(1st leg): 13/08/2003 19:00 | 2nd (2nd leg): 27/08/2003 18:30 | Winner: Galatasaray | ||||
| 1st(1st leg) | MTK Budapest | - | Celtic FC | 0:4 (0:2) | ||
| 2nd (2nd leg) | Celtic FC | - | MTK Budapest | 1:0 (1:0) | ||
| 1st(1st leg): 13/08/2003 19:00 | 2nd (2nd leg): 27/08/2003 19:45 | Winner: Celtic FC | ||||
| 1st(1st leg) | Austria Wien | - | Olympique Marseille | 0:1 (0:1) | ||
| 2nd (2nd leg) | Olympique Marseille | - | Austria Wien | 0:0 (0:0) | ||
| 1st(1st leg): 13/08/2003 19:30 | 2nd (2nd leg): 27/08/2003 19:50 | Winner: Olympique Marseille | ||||
| 1st(1st leg) | Club Brugge KV | - | Borussia Dortmund | 2:1 (2:0) | ||
| 2nd (2nd leg) | Borussia Dortmund | - | Club Brugge KV | 2:4 (1:1, 2:1, 2:1) pso | ||
| 1st(1st leg): 13/08/2003 19:30 | 2nd (2nd leg): 27/08/2003 19:30 | Winner: Club Brugge KV | ||||
| 1st(1st leg) | Grasshopper Club Zürich | - | AEK Athen | 1:0 (0:0) | ||
| 2nd (2nd leg) | AEK Athen | - | Grasshopper Club Zürich | 3:1 (3:0) | ||
| 1st(1st leg): 13/08/2003 19:30 | 2nd (2nd leg): 27/08/2003 19:30 | Winner: AEK Athen | ||||
| 1st(1st leg) | RSC Anderlecht | - | Wisła Kraków | 3:1 (2:0) | ||
| 2nd (2nd leg) | Wisła Kraków | - | RSC Anderlecht | 0:1 (0:0) | ||
| 1st(1st leg): 13/08/2003 19:30 | 2nd (2nd leg): 26/08/2003 20:00 | Winner: RSC Anderlecht | ||||
| 1st(1st leg) | Partizan | - | Newcastle United | 0:1 (0:1) | ||
| 2nd (2nd leg) | Newcastle United | - | Partizan | 3:4 (0:0, 0:1, 0:1) pso | ||
| 1st(1st leg): 13/08/2003 19:30 | 2nd (2nd leg): 27/08/2003 19:45 | Winner: Partizan | ||||
| 1st(1st leg) | Rosenborg BK | - | Deportivo La Coruña | 0:0 (0:0) | ||
| 2nd (2nd leg) | Deportivo La Coruña | - | Rosenborg BK | 1:0 (1:0) | ||
| 1st(1st leg): 13/08/2003 19:45 | 2nd (2nd leg): 26/08/2003 20:30 | Winner: Deportivo La Coruña | ||||
| 1st(1st leg) | Rangers FC | - | FC København | 1:1 (1:0) | ||
| 2nd (2nd leg) | FC København | - | Rangers FC | 1:2 (0:0) | ||
| 1st(1st leg): 13/08/2003 19:45 | 2nd (2nd leg): 27/08/2003 19:05 | Winner: Rangers FC | ||||
| 1st(1st leg) | Lazio Roma | - | SL Benfica | 3:1 (1:0) | ||
| 2nd (2nd leg) | SL Benfica | - | Lazio Roma | 0:1 (0:1) | ||
| 1st(1st leg): 13/08/2003 20:00 | 2nd (2nd leg): 27/08/2003 21:00 | Winner: Lazio Roma | ||||
