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| 1st(1st leg) | Ethnikos Achna | - | Örgryte IS | 2:1 (1:1) | ||
| 2nd (2nd leg) | Örgryte IS | - | Ethnikos Achna | 4:0 (1:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Örgryte IS | ||||
| 1st(1st leg) | Dnepr Mogilev | - | Debreceni VSC | 2:4 (1:2) | ||
| 2nd (2nd leg) | Debreceni VSC | - | Dnepr Mogilev | 6:0 (3:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Debreceni VSC | ||||
| 1st(1st leg) | ÍF Leiftur | - | Vorskla Poltava | 0:3 dec. | ||
| 2nd (2nd leg) | Vorskla Poltava | - | ÍF Leiftur | 3:0 (1:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Vorskla Poltava | ||||
| 1st(1st leg) | Ebbw Vale AFC | - | Kongsvinger IL | 1:6 (1:2) | ||
| 2nd (2nd leg) | Kongsvinger IL | - | Ebbw Vale AFC | 3:0 (0:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 28/06/1998 | Winner: Kongsvinger IL | ||||
| 1st(1st leg) | National Bucureşti | - | Hapoel Haifa | 3:1 (1:0) | ||
| 2nd (2nd leg) | Hapoel Haifa | - | National Bucureşti | 1:2 (1:1) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: National Bucureşti | ||||
| 1st(1st leg) | Austria Wien | - | Ruch Chorzów | 0:1 (0:0) | ||
| 2nd (2nd leg) | Ruch Chorzów | - | Austria Wien | 2:2 (0:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Ruch Chorzów | ||||
| 1st(1st leg) | Baltika Kaliningrad | - | Spartak Varna | 4:0 (1:0) | ||
| 2nd (2nd leg) | Spartak Varna | - | Baltika Kaliningrad | 1:1 (0:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Baltika Kaliningrad | ||||
| 1st(1st leg) | Stabæk IF | - | Vojvodina | 1:2 (1:1) | ||
| 2nd (2nd leg) | Vojvodina | - | Stabæk IF | 3:2 (3:1) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Vojvodina | ||||
| 1st(1st leg) | Hrvatski Dragovoljac | - | Lyngby FC | 1:4 (1:1) | ||
| 2nd (2nd leg) | Lyngby FC | - | Hrvatski Dragovoljac | 0:1 (0:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 28/06/1998 | Winner: Lyngby FC | ||||
| 1st(1st leg) | CS Hobscheid | - | SK Hradec Králové | 0:0 (0:0) | ||
| 2nd (2nd leg) | SK Hradec Králové | - | CS Hobscheid | 2:1 (1:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 28/06/1998 | Winner: SK Hradec Králové | ||||
| 1st(1st leg) | Diósgyöri VTK | - | Sliema Wanderers | 2:0 (1:0) | ||
| 2nd (2nd leg) | Sliema Wanderers | - | Diósgyöri VTK | 2:3 (1:1) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 28/06/1998 | Winner: Diósgyöri VTK | ||||
| 1st(1st leg) | VB Vágur | - | FC Boby-sport Brno | 0:3 (0:2) | ||
| 2nd (2nd leg) | FC Boby-sport Brno | - | VB Vágur | 3:1 (2:0) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: FC Boby-sport Brno | ||||
| 1st(1st leg) | FC St. Gallen | - | Tulevik Viljandi | 3:2 (2:1) | ||
| 2nd (2nd leg) | Tulevik Viljandi | - | FC St. Gallen | 1:6 (1:3) | ||
| 1st(1st leg): 20/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: FC St. Gallen | ||||
| 1st(1st leg) | Altay Izmir | - | Shamrock Rovers | 3:1 (2:1) | ||
| 2nd (2nd leg) | Shamrock Rovers | - | Altay Izmir | 3:2 (1:0, 3:1) aet | ||
| 1st(1st leg): 21/06/1998 | 2nd (2nd leg): 28/06/1998 | Winner: Altay Izmir | ||||
| 1st(1st leg) | FC Tauris Rimavská Sobota | - | Omagh Town FC | 1:0 (0:0) | ||
| 2nd (2nd leg) | Omagh Town FC | - | FC Tauris Rimavská Sobota | 2:2 (1:1) | ||
| 1st(1st leg): 21/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: FC Tauris Rimavská Sobota | ||||
| 1st(1st leg) | TPS Turku | - | FC Sion | 0:1 (0:0) | ||
| 2nd (2nd leg) | FC Sion | - | TPS Turku | 2:3 (1:1) | ||
| 1st(1st leg): 21/06/1998 | 2nd (2nd leg): 28/06/1998 | Winner: TPS Turku | ||||
| 1st(1st leg) | FC Dinaburg | - | Ozeta Dukla Trencin | 1:1 (1:1) | ||
| 2nd (2nd leg) | Ozeta Dukla Trencin | - | FC Dinaburg | 4:1 (2:0) | ||
| 1st(1st leg): 21/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Ozeta Dukla Trencin | ||||
| 1st(1st leg) | Inkaras Kaunas | - | Baki Fahlasi | 1:0 (1:0) | ||
| 2nd (2nd leg) | Baki Fahlasi | - | Inkaras Kaunas | 4:5 (1:0, 1:0, 1:0) pso | ||
| 1st(1st leg): 21/06/1998 | 2nd (2nd leg): 28/06/1998 | Winner: Inkaras Kaunas | ||||
| 1st(1st leg) | Torpedo Kutaisi | - | Erebuni-Homenmen Yerevan | 6:0 (4:0) | ||
| 2nd (2nd leg) | Erebuni-Homenmen Yerevan | - | Torpedo Kutaisi | 1:1 (1:1) | ||
| 1st(1st leg): 21/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Torpedo Kutaisi | ||||
| 1st(1st leg) | Makedonija GP | - | Olimpija Ljubljana | 4:2 (2:1) | ||
| 2nd (2nd leg) | Olimpija Ljubljana | - | Makedonija GP | 1:1 (1:0) | ||
| 1st(1st leg): 21/06/1998 | 2nd (2nd leg): 27/06/1998 | Winner: Makedonija GP | ||||
