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| 1st(1st leg) | Wisła Kraków | - | Parma AC | 1:1 (0:1) | ||
| 2nd (2nd leg) | Parma AC | - | Wisła Kraków | 2:1 (1:0) | ||
| 1st(1st leg): 20/10/1998 13:30 | 2nd (2nd leg): 03/11/1998 18:00 | Winner: Parma AC | ||||
| 1st(1st leg) | Bologna FC | - | Slavia Praha | 2:1 (1:0) | ||
| 2nd (2nd leg) | Slavia Praha | - | Bologna FC | 0:2 (0:0) | ||
| 1st(1st leg): 20/10/1998 16:00 | 2nd (2nd leg): 03/11/1998 15:30 | Winner: Bologna FC | ||||
| 1st(1st leg) | Crvena Zvezda | - | Olympique Lyon | 1:2 (0:0) | ||
| 2nd (2nd leg) | Olympique Lyon | - | Crvena Zvezda | 3:2 (3:1) | ||
| 1st(1st leg): 20/10/1998 16:30 | 2nd (2nd leg): 03/11/1998 19:15 | Winner: Olympique Lyon | ||||
| 1st(1st leg) | Dinamo Moskva | - | Real Sociedad | 2:3 (0:3) | ||
| 2nd (2nd leg) | Real Sociedad | - | Dinamo Moskva | 3:0 (0:0) | ||
| 1st(1st leg): 20/10/1998 17:00 | 2nd (2nd leg): 03/11/1998 19:00 | Winner: Real Sociedad | ||||
| 1st(1st leg) | Grazer AK | - | AS Monaco | 3:3 (1:1) | ||
| 2nd (2nd leg) | AS Monaco | - | Grazer AK | 4:0 (2:0) | ||
| 1st(1st leg): 20/10/1998 17:15 | 2nd (2nd leg): 03/11/1998 18:45 | Winner: AS Monaco | ||||
| 1st(1st leg) | Grasshopper Club Zürich | - | ACF Fiorentina | 0:2 (0:1) | ||
| 2nd (2nd leg) | ACF Fiorentina | - | Grasshopper Club Zürich | 0:3 (2:1) dec. | ||
| 1st(1st leg): 20/10/1998 18:00 | 2nd (2nd leg): 03/11/1998 | Winner: Grasshopper Club Zürich | ||||
| 1st(1st leg) | VfB Stuttgart | - | Club Brugge KV | 1:1 (1:0) | ||
| 2nd (2nd leg) | Club Brugge KV | - | VfB Stuttgart | 3:2 (0:0, 1:1) aet | ||
| 1st(1st leg): 20/10/1998 18:00 | 2nd (2nd leg): 03/11/1998 18:00 | Winner: Club Brugge KV | ||||
| 1st(1st leg) | CSKA Sofia | - | Atlético Madrid | 2:4 (0:2) | ||
| 2nd (2nd leg) | Atlético Madrid | - | CSKA Sofia | 1:0 (1:0) | ||
| 1st(1st leg): 20/10/1998 18:15 | 2nd (2nd leg): 03/11/1998 20:30 | Winner: Atlético Madrid | ||||
| 1st(1st leg) | Vitesse | - | Girondins Bordeaux | 0:1 (0:1) | ||
| 2nd (2nd leg) | Girondins Bordeaux | - | Vitesse | 2:1 (1:1) | ||
| 1st(1st leg): 20/10/1998 18:30 | 2nd (2nd leg): 03/11/1998 18:00 | Winner: Girondins Bordeaux | ||||
| 1st(1st leg) | Willem II | - | Real Betis | 1:1 (0:0) | ||
| 2nd (2nd leg) | Real Betis | - | Willem II | 3:0 (1:0) | ||
| 1st(1st leg): 20/10/1998 19:00 | 2nd (2nd leg): 03/11/1998 20:30 | Winner: Real Betis | ||||
| 1st(1st leg) | AS Roma | - | Leeds United | 1:0 (1:0) | ||
| 2nd (2nd leg) | Leeds United | - | AS Roma | 0:0 (0:0) | ||
| 1st(1st leg): 20/10/1998 19:45 | 2nd (2nd leg): 03/11/1998 19:45 | Winner: AS Roma | ||||
| 1st(1st leg) | Liverpool FC | - | Valencia CF | 0:0 (0:0) | ||
| 2nd (2nd leg) | Valencia CF | - | Liverpool FC | 2:2 (1:0) | ||
| 1st(1st leg): 20/10/1998 19:45 | 2nd (2nd leg): 03/11/1998 20:30 | Winner: Liverpool FC | ||||
| 1st(1st leg) | Werder Bremen | - | Olympique Marseille | 1:1 (0:0) | ||
| 2nd (2nd leg) | Olympique Marseille | - | Werder Bremen | 3:2 (1:0) | ||
| 1st(1st leg): 20/10/1998 19:45 | 2nd (2nd leg): 03/11/1998 20:00 | Winner: Olympique Marseille | ||||
| 1st(1st leg) | Celtic FC | - | FC Zürich | 1:1 (1:0) | ||
| 2nd (2nd leg) | FC Zürich | - | Celtic FC | 4:2 (0:0) | ||
| 1st(1st leg): 20/10/1998 20:00 | 2nd (2nd leg): 03/11/1998 19:15 | Winner: FC Zürich | ||||
| 1st(1st leg) | RC Celta | - | Aston Villa | 0:1 (0:1) | ||
| 2nd (2nd leg) | Aston Villa | - | RC Celta | 1:3 (1:2) | ||
| 1st(1st leg): 20/10/1998 20:15 | 2nd (2nd leg): 03/11/1998 19:45 | Winner: RC Celta | ||||
| 1st(1st leg) | Bayer Leverkusen | - | Rangers FC | 1:2 (0:1) | ||
| 2nd (2nd leg) | Rangers FC | - | Bayer Leverkusen | 1:1 (0:0) | ||
| 1st(1st leg): 22/10/1998 19:30 | 2nd (2nd leg): 05/11/1998 19:45 | Winner: Rangers FC | ||||
