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| 1st(1st leg) | Vitória Setúbal | - | RWD Molenbeek | 1:0 (0:0) | ||
| 2nd (2nd leg) | RWD Molenbeek | - | Vitória Setúbal | 2:1 (1:0) | ||
| 1st(1st leg): 16/10/1973 22:50 | 2nd (2nd leg): 07/11/1973 19:00 | Winner: Vitória Setúbal | ||||
| 1st(1st leg) | Olympique Marseille | - | 1. FC Köln | 2:0 (0:0) | ||
| 2nd (2nd leg) | 1. FC Köln | - | Olympique Marseille | 6:0 (4:0) | ||
| 1st(1st leg): 23/10/1973 19:30 | 2nd (2nd leg): 06/11/1973 19:00 | Winner: 1. FC Köln | ||||
| 1st(1st leg) | Dinamo Tbilisi | - | OFK Beograd | 3:0 (2:0) | ||
| 2nd (2nd leg) | OFK Beograd | - | Dinamo Tbilisi | 1:5 (0:3) | ||
| 1st(1st leg): 24/10/1973 14:00 | 2nd (2nd leg): 07/11/1973 12:30 | Winner: Dinamo Tbilisi | ||||
| 1st(1st leg) | Lokomotiv Plovdiv | - | Budapest Honved SE | 3:4 (2:3) | ||
| 2nd (2nd leg) | Budapest Honved SE | - | Lokomotiv Plovdiv | 3:2 (1:0) | ||
| 1st(1st leg): 24/10/1973 16:00 | 2nd (2nd leg): 07/11/1973 12:30 | Winner: Budapest Honved SE | ||||
| 1st(1st leg) | 1. FC Lokomotive Leipzig | - | Wolverhampton Wanderers | 3:0 (1:0) | ||
| 2nd (2nd leg) | Wolverhampton Wanderers | - | 1. FC Lokomotive Leipzig | 4:1 (0:0) | ||
| 1st(1st leg): 24/10/1973 16:00 | 2nd (2nd leg): 07/11/1973 19:30 | Winner: 1. FC Lokomotive Leipzig | ||||
| 1st(1st leg) | Dinamo Kiev | - | B 1903 København | 1:0 (0:0) | ||
| 2nd (2nd leg) | B 1903 København | - | Dinamo Kiev | 1:2 (0:0) | ||
| 1st(1st leg): 24/10/1973 17:00 | 2nd (2nd leg): 07/11/1973 18:00 | Winner: Dinamo Kiev | ||||
| 1st(1st leg) | Ruch Chorzów | - | FC Carl Zeiss Jena | 3:0 (1:0) | ||
| 2nd (2nd leg) | FC Carl Zeiss Jena | - | Ruch Chorzów | 1:0 (0:0) | ||
| 1st(1st leg): 24/10/1973 17:00 | 2nd (2nd leg): 07/11/1973 16:00 | Winner: Ruch Chorzów | ||||
| 1st(1st leg) | Admira/Wacker | - | Fortuna Düsseldorf | 2:1 (0:1) | ||
| 2nd (2nd leg) | Fortuna Düsseldorf | - | Admira/Wacker | 3:0 (3:0) | ||
| 1st(1st leg): 24/10/1973 18:00 | 2nd (2nd leg): 06/11/1973 18:30 | Winner: Fortuna Düsseldorf | ||||
| 1st(1st leg) | VfB Stuttgart | - | TJ Tatran Prešov | 3:1 (0:1) | ||
| 2nd (2nd leg) | TJ Tatran Prešov | - | VfB Stuttgart | 3:5 (1:1, 3:1) aet | ||
| 1st(1st leg): 24/10/1973 18:00 | 2nd (2nd leg): 07/11/1973 12:30 | Winner: VfB Stuttgart | ||||
| 1st(1st leg) | Standard Liège | - | FC Universitatea Craiova | 2:0 (1:0) | ||
| 2nd (2nd leg) | FC Universitatea Craiova | - | Standard Liège | 1:1 (1:0) | ||
| 1st(1st leg): 24/10/1973 19:00 | 2nd (2nd leg): 07/11/1973 12:15 | Winner: Standard Liège | ||||
| 1st(1st leg) | Aberdeen FC | - | Tottenham Hotspur | 1:1 (0:1) | ||
| 2nd (2nd leg) | Tottenham Hotspur | - | Aberdeen FC | 4:1 (2:0) | ||
| 1st(1st leg): 24/10/1973 19:30 | 2nd (2nd leg): 07/11/1973 19:30 | Winner: Tottenham Hotspur | ||||
| 1st(1st leg) | Feyenoord | - | Gwardia Warszawa | 3:1 (0:1) | ||
| 2nd (2nd leg) | Gwardia Warszawa | - | Feyenoord | 1:0 (1:0) | ||
| 1st(1st leg): 24/10/1973 19:30 | 2nd (2nd leg): 06/11/1973 16:30 | Winner: Feyenoord | ||||
| 1st(1st leg) | Ipswich Town | - | Lazio Roma | 4:0 (2:0) | ||
| 2nd (2nd leg) | Lazio Roma | - | Ipswich Town | 4:2 (2:0) | ||
| 1st(1st leg): 24/10/1973 19:30 | 2nd (2nd leg): 07/11/1973 20:00 | Winner: Ipswich Town | ||||
| 1st(1st leg) | Leeds United | - | Hibernian FC | 0:0 (0:0) | ||
| 2nd (2nd leg) | Hibernian FC | - | Leeds United | 4:5 (0:0, 0:0, 0:0) pso | ||
| 1st(1st leg): 24/10/1973 19:30 | 2nd (2nd leg): 07/11/1973 19:45 | Winner: Leeds United | ||||
| 1st(1st leg) | OGC Nice | - | Fenerbahçe | 4:0 (2:0) | ||
| 2nd (2nd leg) | Fenerbahçe | - | OGC Nice | 2:0 (1:0) | ||
| 1st(1st leg): 24/10/1973 19:30 | 2nd (2nd leg): 07/11/1973 18:00 | Winner: OGC Nice | ||||
| 1st(1st leg) | Panachaiki GE | - | FC Twente '65 | 1:1 (1:1) | ||
| 2nd (2nd leg) | FC Twente '65 | - | Panachaiki GE | 7:0 (0:0) | ||
| 1st(1st leg): 25/10/1973 13:30 | 2nd (2nd leg): 08/11/1973 19:00 | Winner: FC Twente '65 | ||||
