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| 1st(1st leg) | FC Zürich | - | Malmö FF | 0:0 (0:0) | ||
| 2nd (2nd leg) | Malmö FF | - | FC Zürich | 1:1 (1:0) | ||
| 1st(1st leg): 23/10/1973 | 2nd (2nd leg): 04/11/1973 | Winner: FC Zürich | ||||
| 1st(1st leg) | Sunderland AFC | - | Sporting CP | 2:1 (1:0) | ||
| 2nd (2nd leg) | Sporting CP | - | Sunderland AFC | 2:0 (1:0) | ||
| 1st(1st leg): 24/10/1973 | 2nd (2nd leg): 07/11/1973 | Winner: Sporting CP | ||||
| 1st(1st leg) | AC Milan | - | Rapid Wien | 0:0 (0:0) | ||
| 2nd (2nd leg) | Rapid Wien | - | AC Milan | 0:2 (0:2) | ||
| 1st(1st leg): 24/10/1973 | 2nd (2nd leg): 07/11/1973 | Winner: AC Milan | ||||
| 1st(1st leg) | Bor. Mönchengladbach | - | Rangers FC | 3:0 (1:0) | ||
| 2nd (2nd leg) | Rangers FC | - | Bor. Mönchengladbach | 3:2 (2:1) | ||
| 1st(1st leg): 24/10/1973 | 2nd (2nd leg): 07/11/1973 | Winner: Bor. Mönchengladbach | ||||
| 1st(1st leg) | PFC Beroe | - | Athletic Bilbao | 3:0 (1:0) | ||
| 2nd (2nd leg) | Athletic Bilbao | - | PFC Beroe | 1:0 (1:0) | ||
| 1st(1st leg): 24/10/1973 | 2nd (2nd leg): 07/11/1973 | Winner: PFC Beroe | ||||
| 1st(1st leg) | SK Brann | - | Glentoran FC | 1:1 (1:0) | ||
| 2nd (2nd leg) | Glentoran FC | - | SK Brann | 3:1 (2:0) | ||
| 1st(1st leg): 24/10/1973 | 2nd (2nd leg): 07/11/1973 | Winner: Glentoran FC | ||||
| 1st(1st leg) | TJ Baník Ostrava OKD | - | 1. FC Magdeburg | 2:0 (1:0) | ||
| 2nd (2nd leg) | 1. FC Magdeburg | - | TJ Baník Ostrava OKD | 3:0 (1:0, 2:0) aet | ||
| 1st(1st leg): 24/10/1973 | 2nd (2nd leg): 07/11/1973 | Winner: 1. FC Magdeburg | ||||
| 1st(1st leg) | Olympique Lyon | - | PAOK Saloniki | 3:3 (1:1) | ||
| 2nd (2nd leg) | PAOK Saloniki | - | Olympique Lyon | 4:0 (2:0) | ||
| 1st(1st leg): 24/10/1973 | 2nd (2nd leg): 07/11/1973 | Winner: PAOK Saloniki | ||||
