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| 1st(1st leg) | Sliema Wanderers | - | ASVS Dukla Praha | 1:2 (0:1) | ||
| 2nd (2nd leg) | ASVS Dukla Praha | - | Sliema Wanderers | 2:0 (0:0) | ||
| 1st(1st leg): 18/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: ASVS Dukla Praha | ||||
| 1st(1st leg) | Trabzonspor | - | FC Barcelona | 1:0 (0:0) | ||
| 2nd (2nd leg) | FC Barcelona | - | Trabzonspor | 7:2 (5:1) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: FC Barcelona | ||||
| 1st(1st leg) | Kuopion PS | - | Dinamo Kiev | 2:2 (1:1) | ||
| 2nd (2nd leg) | Dinamo Kiev | - | Kuopion PS | 4:0 (2:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Dinamo Kiev | ||||
| 1st(1st leg) | FC Sliven | - | Juventus | 0:2 (0:1) | ||
| 2nd (2nd leg) | Juventus | - | FC Sliven | 6:1 (3:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Juventus | ||||
| 1st(1st leg) | 1. FC Kaiserslautern | - | Sampdoria | 1:0 (0:0) | ||
| 2nd (2nd leg) | Sampdoria | - | 1. FC Kaiserslautern | 2:0 (1:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Sampdoria | ||||
| 1st(1st leg) | Nea Salamina | - | Aberdeen FC | 0:2 (0:0) | ||
| 2nd (2nd leg) | Aberdeen FC | - | Nea Salamina | 3:0 (2:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Aberdeen FC | ||||
| 1st(1st leg) | Olympiakos Piraeus | - | Flamurtari Vlorë | 3:1 (2:0) | ||
| 2nd (2nd leg) | Flamurtari Vlorë | - | Olympiakos Piraeus | 0:2 (0:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Olympiakos Piraeus | ||||
| 1st(1st leg) | Legia Warszawa | - | Swift Hesperange | 3:0 (0:0) | ||
| 2nd (2nd leg) | Swift Hesperange | - | Legia Warszawa | 0:3 (0:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Legia Warszawa | ||||
| 1st(1st leg) | Polizei SV Schwerin | - | Austria Wien | 0:2 (0:2) | ||
| 2nd (2nd leg) | Austria Wien | - | Polizei SV Schwerin | 0:0 (0:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Austria Wien | ||||
| 1st(1st leg) | Viking FK | - | RFC Liège | 0:2 (0:1) | ||
| 2nd (2nd leg) | RFC Liège | - | Viking FK | 3:0 (2:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: RFC Liège | ||||
| 1st(1st leg) | Fram Reykjavík | - | Djurgårdens IF | 3:0 (0:0) | ||
| 2nd (2nd leg) | Djurgårdens IF | - | Fram Reykjavík | 1:1 (0:1) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Fram Reykjavík | ||||
| 1st(1st leg) | Wrexham AFC | - | Lyngby BK | 0:0 (0:0) | ||
| 2nd (2nd leg) | Lyngby BK | - | Wrexham AFC | 0:1 (0:1) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Wrexham AFC | ||||
| 1st(1st leg) | Glentoran FC | - | CSA Steaua București | 1:1 (0:0) | ||
| 2nd (2nd leg) | CSA Steaua București | - | Glentoran FC | 5:0 (3:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: CSA Steaua București | ||||
| 1st(1st leg) | Manchester United | - | Pécsi Munkás SC | 2:0 (2:0) | ||
| 2nd (2nd leg) | Pécsi Munkás SC | - | Manchester United | 0:1 (0:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Manchester United | ||||
| 1st(1st leg) | Estrela Amadora | - | Neuchâtel Xamax FC | 1:1 (1:0) | ||
| 2nd (2nd leg) | Neuchâtel Xamax FC | - | Estrela Amadora | 3:4 (0:0, 1:1, 1:1) pso | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Estrela Amadora | ||||
| 1st(1st leg) | Montpellier HSC | - | PSV Eindhoven | 1:0 (0:0) | ||
| 2nd (2nd leg) | PSV Eindhoven | - | Montpellier HSC | 0:0 (0:0) | ||
| 1st(1st leg): 19/09/1990 | 2nd (2nd leg): 03/10/1990 | Winner: Montpellier HSC | ||||
