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