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| 1st(1st leg) | KV Mechelen | - | Atalanta | 2:1 (1:1) | ||
| 2nd (2nd leg) | Atalanta | - | KV Mechelen | 1:2 (1:0) | ||
| 1st(1st leg): 06/04/1988 | 2nd (2nd leg): 20/04/1988 | Winner: KV Mechelen | ||||
| 1st(1st leg) | Olympique Marseille | - | AFC Ajax | 0:3 (0:2) | ||
| 2nd (2nd leg) | AFC Ajax | - | Olympique Marseille | 1:2 (1:0) | ||
| 1st(1st leg): 06/04/1988 | 2nd (2nd leg): 20/04/1988 | Winner: AFC Ajax | ||||
