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| 1st(1st leg) | NAC Breda | - | 1. FC Magdeburg | 0:0 (0:0) | ||
| 2nd (2nd leg) | 1. FC Magdeburg | - | NAC Breda | 2:0 (0:0) | ||
| 1st(1st leg): 13/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: 1. FC Magdeburg | ||||
| 1st(1st leg) | PFC Beroe | - | CS FOLA Esch | 7:0 (4:0) | ||
| 2nd (2nd leg) | CS FOLA Esch | - | PFC Beroe | 1:4 (0:1) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 22/09/1973 | Winner: PFC Beroe | ||||
| 1st(1st leg) | FC Reipas Lahti (old) | - | Olympique Lyonnais | 0:0 (0:0) | ||
| 2nd (2nd leg) | Olympique Lyonnais | - | FC Reipas Lahti (old) | 2:0 (1:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Olympique Lyonnais | ||||
| 1st(1st leg) | Randers Freja | - | Rapid Wien | 0:0 (0:0) | ||
| 2nd (2nd leg) | Rapid Wien | - | Randers Freja | 2:1 (1:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Rapid Wien | ||||
| 1st(1st leg) | AC Milan | - | Dinamo Zagreb | 3:1 (2:0) | ||
| 2nd (2nd leg) | Dinamo Zagreb | - | AC Milan | 0:1 (0:1) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: AC Milan | ||||
| 1st(1st leg) | Gżira United | - | SK Brann | 0:2 (0:1) | ||
| 2nd (2nd leg) | SK Brann | - | Gżira United | 7:0 (1:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: SK Brann | ||||
| 1st(1st leg) | Chimia Râmnicu-Vâlcea | - | Glentoran FC | 2:2 (2:1) | ||
| 2nd (2nd leg) | Glentoran FC | - | Chimia Râmnicu-Vâlcea | 2:0 (1:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Glentoran FC | ||||
| 1st(1st leg) | Torpedo Moskva | - | Athletic Bilbao | 0:0 (0:0) | ||
| 2nd (2nd leg) | Athletic Bilbao | - | Torpedo Moskva | 2:0 (1:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Athletic Bilbao | ||||
| 1st(1st leg) | Budapesti Vasas | - | Sunderland AFC | 0:2 (0:0) | ||
| 2nd (2nd leg) | Sunderland AFC | - | Budapesti Vasas | 1:0 (0:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Sunderland AFC | ||||
| 1st(1st leg) | Legia Warszawa | - | PAOK Saloniki | 1:1 (0:0) | ||
| 2nd (2nd leg) | PAOK Saloniki | - | Legia Warszawa | 1:0 (0:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: PAOK Saloniki | ||||
| 1st(1st leg) | Pezoporikos Larnaca | - | Malmö FF | 0:0 (0:0) | ||
| 2nd (2nd leg) | Malmö FF | - | Pezoporikos Larnaca | 11:0 (6:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Malmö FF | ||||
| 1st(1st leg) | Cardiff City | - | Sporting CP | 0:0 (0:0) | ||
| 2nd (2nd leg) | Sporting CP | - | Cardiff City | 2:1 (1:1) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Sporting CP | ||||
| 1st(1st leg) | TJ Baník Ostrava OKD | - | Cork Hibernians | 1:0 (1:0) | ||
| 2nd (2nd leg) | Cork Hibernians | - | TJ Baník Ostrava OKD | 1:2 (0:1) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: TJ Baník Ostrava OKD | ||||
| 1st(1st leg) | MKE Ankaragücü | - | Rangers FC | 0:2 (0:1) | ||
| 2nd (2nd leg) | Rangers FC | - | MKE Ankaragücü | 4:0 (3:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Rangers FC | ||||
| 1st(1st leg) | RSC Anderlecht | - | FC Zürich | 3:2 (0:2) | ||
| 2nd (2nd leg) | FC Zürich | - | RSC Anderlecht | 1:0 (1:0) | ||
| 1st(1st leg): 19/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: FC Zürich | ||||
| 1st(1st leg) | ÍBV Vestmannaeyjar | - | Bor. Mönchengladbach | 0:7 (0:3) | ||
| 2nd (2nd leg) | Bor. Mönchengladbach | - | ÍBV Vestmannaeyjar | 9:1 (6:0) | ||
| 1st(1st leg): 20/09/1973 | 2nd (2nd leg): 03/10/1973 | Winner: Bor. Mönchengladbach | ||||
