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| H | Brøndby IF | - | Torpedo Moskva | 1:0 (0:0) | ||
| R | Torpedo Moskva | - | Brøndby IF | 2:4 (0:0, 1:0, 1:0) i.E. | ||
| H: 06.03.1991 | R: 20.03.1991 | Sieger: Brøndby IF | ||||
| H | Atalanta | - | Inter | 0:0 (0:0) | ||
| R | Inter | - | Atalanta | 2:0 (0:0) | ||
| H: 06.03.1991 | R: 20.03.1991 | Sieger: Inter | ||||
| H | Bologna FC | - | Sporting CP | 1:1 (0:0) | ||
| R | Sporting CP | - | Bologna FC | 2:0 (1:0) | ||
| H: 06.03.1991 | R: 20.03.1991 | Sieger: Sporting CP | ||||
| H | AS Roma | - | RSC Anderlecht | 3:0 (1:0) | ||
| R | RSC Anderlecht | - | AS Roma | 2:3 (0:1) | ||
| H: 06.03.1991 | R: 20.03.1991 | Sieger: AS Roma | ||||
