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| 1st(1st leg) | Dinamo Tbilisi | - | FK Vllaznia | 3:0 dec. | ||
| 2nd (2nd leg) | FK Vllaznia | - | Dinamo Tbilisi | 3:1 (1:0) | ||
| 1st(1st leg): 22/07/1998 15:00 | 2nd (2nd leg): 29/07/1998 16:00 | Winner: Dinamo Tbilisi | ||||
| 1st(1st leg) | Sileks Kratovo | - | Club Brugge KV | 0:0 (0:0) | ||
| 2nd (2nd leg) | Club Brugge KV | - | Sileks Kratovo | 2:1 (2:0) | ||
| 1st(1st leg): 22/07/1998 16:00 | 2nd (2nd leg): 29/07/1998 19:30 | Winner: Club Brugge KV | ||||
| 1st(1st leg) | FK Kareda Siauliai | - | Maribor Teatanic | 0:3 (0:1) | ||
| 2nd (2nd leg) | Maribor Teatanic | - | FK Kareda Siauliai | 1:0 (0:0) | ||
| 1st(1st leg): 22/07/1998 16:00 | 2nd (2nd leg): 29/07/1998 17:00 | Winner: Maribor Teatanic | ||||
| 1st(1st leg) | Beitar Jerusalem | - | B36 Tórshavn | 4:1 (3:0) | ||
| 2nd (2nd leg) | B36 Tórshavn | - | Beitar Jerusalem | 0:1 (0:0) | ||
| 1st(1st leg): 22/07/1998 16:00 | 2nd (2nd leg): 27/07/1998 19:00 | Winner: Beitar Jerusalem | ||||
| 1st(1st leg) | FK Obilić | - | ÍBV Vestmannaeyjar | 2:0 (1:0) | ||
| 2nd (2nd leg) | ÍBV Vestmannaeyjar | - | FK Obilić | 1:2 (1:0) | ||
| 1st(1st leg): 22/07/1998 16:00 | 2nd (2nd leg): 29/07/1998 19:00 | Winner: FK Obilić | ||||
| 1st(1st leg) | FC Zimbru | - | Újpest FC | 1:0 (1:0) | ||
| 2nd (2nd leg) | Újpest FC | - | FC Zimbru | 3:1 (1:1) | ||
| 1st(1st leg): 22/07/1998 16:00 | 2nd (2nd leg): 29/07/1998 19:00 | Winner: Újpest FC | ||||
| 1st(1st leg) | ŁKS Łódź | - | FK Kapaz Gäncä | 4:1 (1:0) | ||
| 2nd (2nd leg) | FK Kapaz Gäncä | - | ŁKS Łódź | 1:3 (0:1) | ||
| 1st(1st leg): 22/07/1998 17:00 | 2nd (2nd leg): 29/07/1998 13:30 | Winner: ŁKS Łódź | ||||
| 1st(1st leg) | Skonto FC | - | Dinamo Minsk | 0:0 (0:0) | ||
| 2nd (2nd leg) | Dinamo Minsk | - | Skonto FC | 1:2 (1:1) | ||
| 1st(1st leg): 22/07/1998 17:00 | 2nd (2nd leg): 29/07/1998 16:00 | Winner: Skonto FC | ||||
| 1st(1st leg) | HJK Helsinki | - | FK Yerevan | 2:0 (0:0) | ||
| 2nd (2nd leg) | FK Yerevan | - | HJK Helsinki | 0:3 (0:2) | ||
| 1st(1st leg): 22/07/1998 17:00 | 2nd (2nd leg): 29/07/1998 15:00 | Winner: HJK Helsinki | ||||
| 1st(1st leg) | Dinamo Kiev | - | Barry Town FC | 8:0 (4:0) | ||
| 2nd (2nd leg) | Barry Town FC | - | Dinamo Kiev | 1:2 (1:1) | ||
| 1st(1st leg): 22/07/1998 18:00 | 2nd (2nd leg): 29/07/1998 19:30 | Winner: Dinamo Kiev | ||||
| 1st(1st leg) | Grasshopper Club Zürich | - | Jeunesse Esch | 6:0 (3:0) | ||
| 2nd (2nd leg) | Jeunesse Esch | - | Grasshopper Club Zürich | 0:2 (0:2) | ||
| 1st(1st leg): 22/07/1998 18:30 | 2nd (2nd leg): 29/07/1998 19:00 | Winner: Grasshopper Club Zürich | ||||
| 1st(1st leg) | AFC Steaua București | - | FC Flora | 4:1 (2:1) | ||
| 2nd (2nd leg) | FC Flora | - | AFC Steaua București | 3:1 (1:0) | ||
| 1st(1st leg): 22/07/1998 18:45 | 2nd (2nd leg): 29/07/1998 15:00 | Winner: AFC Steaua București | ||||
| 1st(1st leg) | Valletta FC | - | Anorthosis Famagusta | 0:2 (0:0) | ||
| 2nd (2nd leg) | Anorthosis Famagusta | - | Valletta FC | 6:0 (3:0) | ||
| 1st(1st leg): 22/07/1998 19:00 | 2nd (2nd leg): 29/07/1998 19:00 | Winner: Anorthosis Famagusta | ||||
| 1st(1st leg) | PFC Litex Lovech | - | Halmstads BK | 2:0 (1:0) | ||
| 2nd (2nd leg) | Halmstads BK | - | PFC Litex Lovech | 2:1 (2:0) | ||
| 1st(1st leg): 22/07/1998 19:15 | 2nd (2nd leg): 29/07/1998 19:00 | Winner: PFC Litex Lovech | ||||
| 1st(1st leg) | Cliftonville FC | - | 1. FC Košice | 1:5 (1:3) | ||
| 2nd (2nd leg) | 1. FC Košice | - | Cliftonville FC | 8:0 (3:0) | ||
| 1st(1st leg): 22/07/1998 19:30 | 2nd (2nd leg): 29/07/1998 18:00 | Winner: 1. FC Košice | ||||
| 1st(1st leg) | Celtic FC | - | St Patrick's Athletic | 0:0 (0:0) | ||
| 2nd (2nd leg) | St Patrick's Athletic | - | Celtic FC | 0:2 (0:1) | ||
| 1st(1st leg): 22/07/1998 19:45 | 2nd (2nd leg): 29/07/1998 19:45 | Winner: Celtic FC | ||||
