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| 1st(1st leg) | SC Bastia | - | Vojvodina | 2:0 (2:0) | ||
| 2nd (2nd leg) | Vojvodina | - | SC Bastia | 4:0 (1:0) | ||
| 1st(1st leg): 29/07/1998 | 2nd (2nd leg): 05/08/1998 | Winner: Vojvodina | ||||
| 1st(1st leg) | Bologna FC | - | Sampdoria | 3:1 (2:1) | ||
| 2nd (2nd leg) | Sampdoria | - | Bologna FC | 1:0 (1:0) | ||
| 1st(1st leg): 29/07/1998 | 2nd (2nd leg): 05/08/1998 | Winner: Bologna FC | ||||
| 1st(1st leg) | Fortuna Sittard | - | SV Austria Salzburg | 2:1 (2:1) | ||
| 2nd (2nd leg) | SV Austria Salzburg | - | Fortuna Sittard | 3:1 (1:0) | ||
| 1st(1st leg): 29/07/1998 | 2nd (2nd leg): 05/08/1998 | Winner: SV Austria Salzburg | ||||
| 1st(1st leg) | Ruch Chorzów | - | Debreceni VSC | 1:0 (0:0) | ||
| 2nd (2nd leg) | Debreceni VSC | - | Ruch Chorzów | 0:3 (0:2) | ||
| 1st(1st leg): 29/07/1998 | 2nd (2nd leg): 05/08/1998 | Winner: Ruch Chorzów | ||||
| 1st(1st leg) | Werder Bremen | - | Samsunspor | 3:0 (1:0) | ||
| 2nd (2nd leg) | Samsunspor | - | Werder Bremen | 0:3 (0:1) | ||
| 1st(1st leg): 29/07/1998 | 2nd (2nd leg): 05/08/1998 | Winner: Werder Bremen | ||||
| 1st(1st leg) | Espanyol Barcelona | - | Valencia CF | 0:1 (0:1) | ||
| 2nd (2nd leg) | Valencia CF | - | Espanyol Barcelona | 2:0 (1:0) | ||
| 1st(1st leg): 29/07/1998 | 2nd (2nd leg): 05/08/1998 | Winner: Valencia CF | ||||
