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| 1st(1st leg) | Celtic FC | - | Werder Bremen | 0:1 (0:0) | ||
| 2nd (2nd leg) | Werder Bremen | - | Celtic FC | 0:0 (0:0) | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 08/11/1988 | Winner: Werder Bremen | ||||
| 1st(1st leg) | Club Brugge KV | - | AS Monaco | 1:0 (0:0) | ||
| 2nd (2nd leg) | AS Monaco | - | Club Brugge KV | 6:1 (5:0) | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 09/11/1988 | Winner: AS Monaco | ||||
| 1st(1st leg) | Nentori Tiranë | - | IFK Göteborg | 0:3 (0:2) | ||
| 2nd (2nd leg) | IFK Göteborg | - | Nentori Tiranë | 1:0 (1:0) | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 09/11/1988 | Winner: IFK Göteborg | ||||
| 1st(1st leg) | Neuchâtel Xamax FC | - | Galatasaray | 3:0 (0:0) | ||
| 2nd (2nd leg) | Galatasaray | - | Neuchâtel Xamax FC | 5:0 (1:0) | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 09/11/1988 | Winner: Galatasaray | ||||
| 1st(1st leg) | AC Milan | - | Crvena Zvezda | 1:1 (0:0) | ||
| 2nd (2nd leg) | Crvena Zvezda | - | AC Milan | 2:4 (1:1, 1:1, 1:1) pso | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 10/11/1988 | Winner: AC Milan | ||||
| 1st(1st leg) | PSV Eindhoven | - | FC Porto | 5:0 (3:0) | ||
| 2nd (2nd leg) | FC Porto | - | PSV Eindhoven | 2:0 (1:0) | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 09/11/1988 | Winner: PSV Eindhoven | ||||
| 1st(1st leg) | CSA Steaua București | - | Spartak Moskva | 3:0 (1:0) | ||
| 2nd (2nd leg) | Spartak Moskva | - | CSA Steaua București | 1:2 (1:1) | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 09/11/1988 | Winner: CSA Steaua București | ||||
| 1st(1st leg) | Górnik Zabrze | - | Real Madrid | 0:1 (0:0) | ||
| 2nd (2nd leg) | Real Madrid | - | Górnik Zabrze | 3:2 (1:1) | ||
| 1st(1st leg): 26/10/1988 | 2nd (2nd leg): 10/11/1988 | Winner: Real Madrid | ||||
