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| U | Ards FC | - | Standard Luik | 3:2 (2:2) | ||
| R | Standard Luik | - | Ards FC | 6:1 (3:1) | ||
| U: 12.09.1973 19:10 | R: 19.09.1973 20:00 | Winnaars: Standard Luik | ||||
| U | Vitória Setúbal | - | K. Beerschot VAV | 2:0 (2:0) | ||
| R | K. Beerschot VAV | - | Vitória Setúbal | 0:2 (0:1) | ||
| U: 12.09.1973 22:45 | R: 26.09.1973 20:00 | Winnaars: Vitória Setúbal | ||||
| U | VfB Stuttgart | - | Olympiakos Nikosia | 9:0 (5:0) | ||
| R | Olympiakos Nikosia | - | VfB Stuttgart | 0:4 (0:2) | ||
| U: 17.09.1973 20:00 | R: 19.09.1973 16:45 | Winnaars: VfB Stuttgart | ||||
| U | Union Luxembourg | - | Olympique Marseille | 0:5 (0:3) | ||
| R | Olympique Marseille | - | Union Luxembourg | 7:1 (4:0) | ||
| U: 18.09.1973 19:00 | R: 03.10.1973 16:00 | Winnaars: Olympique Marseille | ||||
| U | Panathinaikos | - | OFK Beograd | 1:2 (0:1) | ||
| R | OFK Beograd | - | Panathinaikos | 0:1 (0:1) | ||
| U: 19.09.1973 15:00 | R: 03.10.1973 15:00 | Winnaars: OFK Beograd | ||||
| U | TJ Tatran Prešov | - | Velež Mostar | 4:2 (3:1) | ||
| R | Velež Mostar | - | TJ Tatran Prešov | 1:1 (0:1) | ||
| U: 19.09.1973 15:00 | R: 03.10.1973 17:00 | Winnaars: TJ Tatran Prešov | ||||
| U | Dinamo Tbilisi | - | Slavia Sofia | 4:1 (2:0) | ||
| R | Slavia Sofia | - | Dinamo Tbilisi | 2:0 (0:0) | ||
| U: 19.09.1973 15:30 | R: 03.10.1973 17:30 | Winnaars: Dinamo Tbilisi | ||||
| U | TJ VSS Košice | - | Budapest Honved SE | 1:0 (0:0) | ||
| R | Budapest Honved SE | - | TJ VSS Košice | 5:2 (2:2) | ||
| U: 19.09.1973 15:30 | R: 03.10.1973 17:00 | Winnaars: Budapest Honved SE | ||||
| U | Sliema Wanderers | - | Lokomotiv Plovdiv | 0:2 (0:2) | ||
| R | Lokomotiv Plovdiv | - | Sliema Wanderers | 1:0 (1:0) | ||
| U: 19.09.1973 16:00 | R: 02.10.1973 17:30 | Winnaars: Lokomotiv Plovdiv | ||||
| U | Eskişehirspor | - | 1. FC Köln | 0:0 (0:0) | ||
| R | 1. FC Köln | - | Eskişehirspor | 2:0 (1:0) | ||
| U: 19.09.1973 16:00 | R: 03.10.1973 20:00 | Winnaars: 1. FC Köln | ||||
| U | Ferencvárosi TC | - | Gwardia Warszawa | 0:1 (0:1) | ||
| R | Gwardia Warszawa | - | Ferencvárosi TC | 2:1 (2:0) | ||
| U: 19.09.1973 16:15 | R: 03.10.1973 19:15 | Winnaars: Gwardia Warszawa | ||||
| U | FC Carl Zeiss Jena | - | MP Mikkeli | 3:0 (2:0) | ||
| R | MP Mikkeli | - | FC Carl Zeiss Jena | 0:3 (0:2) | ||
| U: 19.09.1973 18:00 | R: 03.10.1973 18:00 | Winnaars: FC Carl Zeiss Jena | ||||
| U | Ruch Chorzów | - | Wuppertaler SV | 4:1 (1:0) | ||
| R | Wuppertaler SV | - | Ruch Chorzów | 5:4 (2:3) | ||
| U: 19.09.1973 18:00 | R: 03.10.1973 18:00 | Winnaars: Ruch Chorzów | ||||
| U | Admira/Wacker | - | Inter | 1:0 (1:0) | ||
| R | Inter | - | Admira/Wacker | 2:1 (0:0, 1:0) n.v. | ||
| U: 19.09.1973 19:00 | R: 03.10.1973 21:00 | Winnaars: Admira/Wacker | ||||
| U | B 1903 København | - | AIK Solna | 2:1 (2:1) | ||
| R | AIK Solna | - | B 1903 København | 1:1 (0:0) | ||
| U: 19.09.1973 19:00 | R: 03.10.1973 19:00 | Winnaars: B 1903 København | ||||
| U | Fenerbahçe | - | Argeș Pitești | 5:1 (1:1) | ||
| R | Argeș Pitești | - | Fenerbahçe | 1:1 (1:1) | ||
| U: 19.09.1973 19:00 | R: 03.10.1973 14:30 | Winnaars: Fenerbahçe | ||||
| U | Fredrikstad FK | - | Dinamo Kiev | 0:1 (0:1) | ||
| R | Dinamo Kiev | - | Fredrikstad FK | 4:0 (2:0) | ||
| U: 19.09.1973 19:00 | R: 03.10.1973 18:00 | Winnaars: Dinamo Kiev | ||||
| U | Strømsgodset IF | - | Leeds United | 1:1 (1:1) | ||
| R | Leeds United | - | Strømsgodset IF | 6:1 (3:1) | ||
| U: 19.09.1973 19:00 | R: 03.10.1973 20:30 | Winnaars: Leeds United | ||||
| U | Östers IF | - | Feyenoord | 1:3 (1:0) | ||
| R | Feyenoord | - | Östers IF | 2:1 (1:0) | ||
| U: 19.09.1973 19:15 | R: 03.10.1973 20:30 | Winnaars: Feyenoord | ||||
| U | Fortuna Düsseldorf | - | Næstved IF | 1:0 (0:0) | ||
| R | Næstved IF | - | Fortuna Düsseldorf | 2:2 (0:1) | ||
| U: 19.09.1973 19:30 | R: 03.10.1973 19:30 | Winnaars: Fortuna Düsseldorf | ||||
| U | Grasshopper Club Zürich | - | Tottenham Hotspur | 1:5 (1:2) | ||
| R | Tottenham Hotspur | - | Grasshopper Club Zürich | 4:1 (0:1) | ||
| U: 19.09.1973 20:15 | R: 03.10.1973 20:30 | Winnaars: Tottenham Hotspur | ||||
| U | Aberdeen FC | - | Finn Harps | 4:1 (3:0) | ||
| R | Finn Harps | - | Aberdeen FC | 1:3 (0:2) | ||
| U: 19.09.1973 20:30 | R: 03.10.1973 18:00 | Winnaars: Aberdeen FC | ||||
| U | Dundee FC | - | FC Twente '65 | 1:3 (0:1) | ||
| R | FC Twente '65 | - | Dundee FC | 4:2 (2:1) | ||
| U: 19.09.1973 20:30 | R: 03.10.1973 20:00 | Winnaars: FC Twente '65 | ||||
| U | Hibernian FC | - | ÍB Keflavík | 2:0 (1:0) | ||
| R | ÍB Keflavík | - | Hibernian FC | 1:1 (1:0) | ||
| U: 19.09.1973 20:30 | R: 03.10.1973 19:15 | Winnaars: Hibernian FC | ||||
| U | Ipswich Town | - | Real Madrid | 1:0 (0:0) | ||
| R | Real Madrid | - | Ipswich Town | 0:0 (0:0) | ||
| U: 19.09.1973 20:30 | R: 03.10.1973 21:00 | Winnaars: Ipswich Town | ||||
| U | OGC Nice | - | FC Barcelona | 3:0 (1:0) | ||
| R | FC Barcelona | - | OGC Nice | 2:0 (1:0) | ||
| U: 19.09.1973 20:30 | R: 03.10.1973 20:45 | Winnaars: OGC Nice | ||||
| U | ACF Fiorentina | - | FC Universitatea Craiova | 0:0 (0:0) | ||
| R | FC Universitatea Craiova | - | ACF Fiorentina | 1:0 (0:0) | ||
| U: 19.09.1973 21:00 | R: 03.10.1973 14:30 | Winnaars: FC Universitatea Craiova | ||||
| U | Torino FC | - | 1. FC Lokomotive Leipzig | 1:2 (0:0) | ||
| R | 1. FC Lokomotive Leipzig | - | Torino FC | 2:1 (2:0) | ||
| U: 19.09.1973 21:00 | R: 03.10.1973 18:00 | Winnaars: 1. FC Lokomotive Leipzig | ||||
| U | Lazio Roma | - | FC Sion | 3:0 (3:0) | ||
| R | FC Sion | - | Lazio Roma | 3:1 (1:1) | ||
| U: 19.09.1973 21:15 | R: 03.10.1973 20:15 | Winnaars: Lazio Roma | ||||
| U | Espanyol | - | RWD Molenbeek | 0:3 (0:2) | ||
| R | RWD Molenbeek | - | Espanyol | 1:2 (1:1) | ||
| U: 19.09.1973 21:30 | R: 03.10.1973 20:00 | Winnaars: RWD Molenbeek | ||||
| U | Panachaiki GE | - | Grazer AK | 2:1 (2:1) | ||
| R | Grazer AK | - | Panachaiki GE | 0:1 (0:0) | ||
| U: 20.09.1973 19:30 | R: 03.10.1973 19:30 | Winnaars: Panachaiki GE | ||||
| U | Os Belenenses | - | Wolverhampton Wanderers | 0:2 (0:1) | ||
| R | Wolverhampton Wanderers | - | Os Belenenses | 2:1 (1:1) | ||
| U: 26.09.1973 22:30 | R: 03.10.1973 20:30 | Winnaars: Wolverhampton Wanderers | ||||
