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| 1st(1st leg) | TJ Spartak TAZ Trnava | - | Zorya Voroshilovgrad | 0:0 (0:0) | ||
| 2nd (2nd leg) | Zorya Voroshilovgrad | - | TJ Spartak TAZ Trnava | 0:1 (0:0) | ||
| 1st(1st leg): 24/10/1973 13:30 | 2nd (2nd leg): 07/11/1973 15:30 | Winner: TJ Spartak TAZ Trnava | ||||
| 1st(1st leg) | Dinamo Bucureşti | - | Atlético Madrid | 0:2 (0:1) | ||
| 2nd (2nd leg) | Atlético Madrid | - | Dinamo Bucureşti | 2:2 (1:2) | ||
| 1st(1st leg): 24/10/1973 14:00 | 2nd (2nd leg): 07/11/1973 | Winner: Atlético Madrid | ||||
| 1st(1st leg) | Crvena Zvezda | - | Liverpool FC | 2:1 (1:0) | ||
| 2nd (2nd leg) | Liverpool FC | - | Crvena Zvezda | 1:2 (0:0) | ||
| 1st(1st leg): 24/10/1973 16:30 | 2nd (2nd leg): 06/11/1973 18:30 | Winner: Crvena Zvezda | ||||
| 1st(1st leg) | Celtic FC | - | Vejle BK | 0:0 (0:0) | ||
| 2nd (2nd leg) | Vejle BK | - | Celtic FC | 0:1 (0:1) | ||
| 1st(1st leg): 24/10/1973 18:45 | 2nd (2nd leg): 06/11/1973 18:30 | Winner: Celtic FC | ||||
| 1st(1st leg) | Club Brugge KV | - | FC Basel | 2:1 (1:1) | ||
| 2nd (2nd leg) | FC Basel | - | Club Brugge KV | 6:4 (3:2) | ||
| 1st(1st leg): 24/10/1973 19:00 | 2nd (2nd leg): 07/11/1973 19:00 | Winner: FC Basel | ||||
| 1st(1st leg) | Bayern München | - | Dynamo Dresden | 4:3 (2:3) | ||
| 2nd (2nd leg) | Dynamo Dresden | - | Bayern München | 3:3 (1:2) | ||
| 1st(1st leg): 24/10/1973 19:00 | 2nd (2nd leg): 07/11/1973 16:30 | Winner: Bayern München | ||||
| 1st(1st leg) | AFC Ajax | - | CSKA Sofia | 1:0 (1:0) | ||
| 2nd (2nd leg) | CSKA Sofia | - | AFC Ajax | 2:0 (0:0, 1:0) aet | ||
| 1st(1st leg): 24/10/1973 19:15 | 2nd (2nd leg): 07/11/1973 15:00 | Winner: CSKA Sofia | ||||
| 1st(1st leg) | SL Benfica | - | Újpesti Dózsa SC | 1:1 (0:0) | ||
| 2nd (2nd leg) | Újpesti Dózsa SC | - | SL Benfica | 2:0 (0:0) | ||
| 1st(1st leg): 24/10/1973 21:45 | 2nd (2nd leg): 07/11/1973 15:00 | Winner: Újpesti Dózsa SC | ||||
