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| 1st(1st leg) | Pyunik FC | - | CSKA Sofia | 0:2 (0:1) | ||
| 2nd (2nd leg) | CSKA Sofia | - | Pyunik FC | 1:0 (0:0) | ||
| 1st(1st leg): 30/07/2003 17:00 | 2nd (2nd leg): 06/08/2003 18:30 | Winner: CSKA Sofia | ||||
| 1st(1st leg) | Leotar Trebinje | - | Slavia Praha | 1:2 (1:1) | ||
| 2nd (2nd leg) | Slavia Praha | - | Leotar Trebinje | 2:0 (1:0) | ||
| 1st(1st leg): 30/07/2003 17:00 | 2nd (2nd leg): 06/08/2003 18:00 | Winner: Slavia Praha | ||||
| 1st(1st leg) | CSKA Moskva | - | Vardar Skopje | 1:2 (0:0) | ||
| 2nd (2nd leg) | Vardar Skopje | - | CSKA Moskva | 1:1 (0:1) | ||
| 1st(1st leg): 30/07/2003 17:00 | 2nd (2nd leg): 06/08/2003 17:00 | Winner: Vardar Skopje | ||||
| 1st(1st leg) | KF Tiranë | - | Grazer AK | 1:5 (1:3) | ||
| 2nd (2nd leg) | Grazer AK | - | KF Tiranë | 2:1 (1:0) | ||
| 1st(1st leg): 30/07/2003 17:00 | 2nd (2nd leg): 06/08/2003 19:30 | Winner: Grazer AK | ||||
| 1st(1st leg) | FC Sheriff | - | Shakhtar Donetsk | 0:0 (0:0) | ||
| 2nd (2nd leg) | Shakhtar Donetsk | - | FC Sheriff | 2:0 (0:0) | ||
| 1st(1st leg): 30/07/2003 18:00 | 2nd (2nd leg): 06/08/2003 17:00 | Winner: Shakhtar Donetsk | ||||
| 1st(1st leg) | Wisła Kraków | - | Omonia Nikosia | 5:2 (3:0) | ||
| 2nd (2nd leg) | Omonia Nikosia | - | Wisła Kraków | 2:2 (1:1) | ||
| 1st(1st leg): 30/07/2003 18:00 | 2nd (2nd leg): 06/08/2003 18:00 | Winner: Wisła Kraków | ||||
| 1st(1st leg) | Rapid Bucureşti | - | RSC Anderlecht | 0:0 (0:0) | ||
| 2nd (2nd leg) | RSC Anderlecht | - | Rapid Bucureşti | 3:2 (0:2) | ||
| 1st(1st leg): 30/07/2003 19:00 | 2nd (2nd leg): 06/08/2003 19:30 | Winner: RSC Anderlecht | ||||
| 1st(1st leg) | Partizan | - | Djurgårdens IF | 1:1 (0:0) | ||
| 2nd (2nd leg) | Djurgårdens IF | - | Partizan | 2:2 (1:0) | ||
| 1st(1st leg): 30/07/2003 19:00 | 2nd (2nd leg): 06/08/2003 19:45 | Winner: Partizan | ||||
| 1st(1st leg) | MTK Budapest | - | HJK Helsinki | 3:1 (2:0) | ||
| 2nd (2nd leg) | HJK Helsinki | - | MTK Budapest | 1:0 (0:0) | ||
| 1st(1st leg): 30/07/2003 19:00 | 2nd (2nd leg): 06/08/2003 17:00 | Winner: MTK Budapest | ||||
| 1st(1st leg) | FBK Kaunas | - | Celtic FC | 0:4 (0:2) | ||
| 2nd (2nd leg) | Celtic FC | - | FBK Kaunas | 1:0 (1:0) | ||
| 1st(1st leg): 30/07/2003 19:00 | 2nd (2nd leg): 06/08/2003 19:45 | Winner: Celtic FC | ||||
| 1st(1st leg) | FC København | - | Sliema Wanderers | 4:1 (3:0) | ||
| 2nd (2nd leg) | Sliema Wanderers | - | FC København | 0:6 (0:3) | ||
| 1st(1st leg): 30/07/2003 19:00 | 2nd (2nd leg): 06/08/2003 19:45 | Winner: FC København | ||||
| 1st(1st leg) | MŠK Žilina | - | Maccabi Tel Aviv | 1:0 (0:0) | ||
| 2nd (2nd leg) | Maccabi Tel Aviv | - | MŠK Žilina | 1:1 (1:1) | ||
| 1st(1st leg): 30/07/2003 19:15 | 2nd (2nd leg): 06/08/2003 15:30 | Winner: MŠK Žilina | ||||
| 1st(1st leg) | NK Maribor | - | Dinamo Zagreb | 1:1 (1:1) | ||
| 2nd (2nd leg) | Dinamo Zagreb | - | NK Maribor | 2:1 (0:1) | ||
| 1st(1st leg): 30/07/2003 19:15 | 2nd (2nd leg): 06/08/2003 19:45 | Winner: Dinamo Zagreb | ||||
| 1st(1st leg) | Bohemian FC | - | Rosenborg BK | 0:1 (0:1) | ||
| 2nd (2nd leg) | Rosenborg BK | - | Bohemian FC | 4:0 (1:0) | ||
| 1st(1st leg): 30/07/2003 19:45 | 2nd (2nd leg): 06/08/2003 19:45 | Winner: Rosenborg BK | ||||
