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| 1st(1st leg) | Celtic FC | - | Diósgyöri VTK | 6:0 (0:0) | ||
| 2nd (2nd leg) | Diósgyöri VTK | - | Celtic FC | 2:1 (1:1) | ||
| 1st(1st leg): 20/08/1980 | 2nd (2nd leg): 03/09/1980 | Winner: Celtic FC | ||||
| 1st(1st leg) | Altay Izmir | - | SL Benfica | 0:0 (0:0) | ||
| 2nd (2nd leg) | SL Benfica | - | Altay Izmir | 4:0 (2:0) | ||
| 1st(1st leg): 20/08/1980 | 2nd (2nd leg): 03/09/1980 | Winner: SL Benfica | ||||
