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| 1st(1st leg) | Vojvodina | - | Örebro SK | 2:0 (1:0) | ||
| 2nd (2nd leg) | Örebro SK | - | Vojvodina | 0:2 (0:0) | ||
| 1st(1st leg): 04/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Vojvodina | ||||
| 1st(1st leg) | Makedonija GP | - | SC Bastia | 1:0 (1:0) | ||
| 2nd (2nd leg) | SC Bastia | - | Makedonija GP | 7:0 (2:0) | ||
| 1st(1st leg): 04/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: SC Bastia | ||||
| 1st(1st leg) | Sampdoria | - | FC Tauris Rimavská Sobota | 2:0 (1:0) | ||
| 2nd (2nd leg) | FC Tauris Rimavská Sobota | - | Sampdoria | 1:0 (1:0) | ||
| 1st(1st leg): 04/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Sampdoria | ||||
| 1st(1st leg) | Altay Izmir | - | Diósgyöri VTK | 1:1 (1:0) | ||
| 2nd (2nd leg) | Diósgyöri VTK | - | Altay Izmir | 0:1 (0:0) | ||
| 1st(1st leg): 04/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Altay Izmir | ||||
| 1st(1st leg) | Ozeta Dukla Trencin | - | Baltika Kaliningrad | 0:1 (0:0) | ||
| 2nd (2nd leg) | Baltika Kaliningrad | - | Ozeta Dukla Trencin | 0:0 (0:0) | ||
| 1st(1st leg): 04/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Baltika Kaliningrad | ||||
| 1st(1st leg) | Werder Bremen | - | Inkaras Kaunas | 4:1 (3:0) | ||
| 2nd (2nd leg) | Inkaras Kaunas | - | Werder Bremen | 0:1 (0:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Werder Bremen | ||||
| 1st(1st leg) | TPS Turku | - | Shinnik Yaroslavl | 0:2 (0:1) | ||
| 2nd (2nd leg) | Shinnik Yaroslavl | - | TPS Turku | 3:2 (1:1) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Shinnik Yaroslavl | ||||
| 1st(1st leg) | FC Boby-sport Brno | - | Espanyol Barcelona | 5:3 (1:1) | ||
| 2nd (2nd leg) | Espanyol Barcelona | - | FC Boby-sport Brno | 2:0 (0:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Espanyol Barcelona | ||||
| 1st(1st leg) | Akademisk BK | - | Vorskla Poltava | 2:2 (0:0) | ||
| 2nd (2nd leg) | Vorskla Poltava | - | Akademisk BK | 1:1 (1:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Vorskla Poltava | ||||
| 1st(1st leg) | SV Austria Salzburg | - | FC St. Gallen | 3:1 (1:0) | ||
| 2nd (2nd leg) | FC St. Gallen | - | SV Austria Salzburg | 1:0 (0:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: SV Austria Salzburg | ||||
| 1st(1st leg) | Iraklis Saloniki | - | National Bucureşti | 3:1 (1:1) | ||
| 2nd (2nd leg) | National Bucureşti | - | Iraklis Saloniki | 3:0 (0:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: National Bucureşti | ||||
| 1st(1st leg) | Lommelse SK | - | Torpedo Kutaisi | 0:1 (0:1) | ||
| 2nd (2nd leg) | Torpedo Kutaisi | - | Lommelse SK | 1:2 (1:2) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Lommelse SK | ||||
| 1st(1st leg) | FC Twente | - | Kongsvinger IL | 2:0 (1:0) | ||
| 2nd (2nd leg) | Kongsvinger IL | - | FC Twente | 0:0 (0:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: FC Twente | ||||
| 1st(1st leg) | Samsunspor | - | Lyngby FC | 3:0 (1:0) | ||
| 2nd (2nd leg) | Lyngby FC | - | Samsunspor | 3:1 (1:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Samsunspor | ||||
| 1st(1st leg) | Debreceni VSC | - | SK Hradec Králové | 0:0 (0:0) | ||
| 2nd (2nd leg) | SK Hradec Králové | - | Debreceni VSC | 1:1 (1:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 12/07/1998 | Winner: Debreceni VSC | ||||
| 1st(1st leg) | Örgryte IS | - | Ruch Chorzów | 2:1 (1:0) | ||
| 2nd (2nd leg) | Ruch Chorzów | - | Örgryte IS | 1:0 (0:0) | ||
| 1st(1st leg): 05/07/1998 | 2nd (2nd leg): 11/07/1998 | Winner: Ruch Chorzów | ||||
