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| 1st(1st leg) | EPA Larnaca | - | Bor. Mönchengladbach | 0:6 (0:3) | ||
| 2nd (2nd leg) | Bor. Mönchengladbach | - | EPA Larnaca | 10:0 (5:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 22/09/1970 | Winner: Bor. Mönchengladbach | ||||
| 1st(1st leg) | Spartak Moskva | - | FC Basel 1893 | 3:2 (1:0) | ||
| 2nd (2nd leg) | FC Basel 1893 | - | Spartak Moskva | 2:1 (0:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: FC Basel 1893 | ||||
| 1st(1st leg) | Fenerbahçe | - | FC Carl Zeiss Jena | 0:4 (0:1) | ||
| 2nd (2nd leg) | FC Carl Zeiss Jena | - | Fenerbahçe | 1:0 (1:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: FC Carl Zeiss Jena | ||||
| 1st(1st leg) | Rosenborg BK | - | Standard Liège | 0:2 (0:1) | ||
| 2nd (2nd leg) | Standard Liège | - | Rosenborg BK | 5:0 (3:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Standard Liège | ||||
| 1st(1st leg) | Sporting CP | - | Floriana FC | 5:0 (4:0) | ||
| 2nd (2nd leg) | Floriana FC | - | Sporting CP | 0:4 (0:1) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Sporting CP | ||||
| 1st(1st leg) | TJ Slovan ChZJD Bratislava | - | B 1903 København | 2:1 (1:1) | ||
| 2nd (2nd leg) | B 1903 København | - | TJ Slovan ChZJD Bratislava | 2:2 (0:1) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: TJ Slovan ChZJD Bratislava | ||||
| 1st(1st leg) | Feijenoord | - | UT Arad | 1:1 (1:1) | ||
| 2nd (2nd leg) | UT Arad | - | Feijenoord | 0:0 (0:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: UT Arad | ||||
| 1st(1st leg) | Everton FC | - | ÍB Keflavík | 6:2 (2:1) | ||
| 2nd (2nd leg) | ÍB Keflavík | - | Everton FC | 0:3 (0:2) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Everton FC | ||||
| 1st(1st leg) | IFK Göteborg | - | Legia Warszawa | 0:4 (0:1) | ||
| 2nd (2nd leg) | Legia Warszawa | - | IFK Göteborg | 2:1 (2:1) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Legia Warszawa | ||||
| 1st(1st leg) | Nentori Tiranë | - | AFC Ajax | 2:2 (0:1) | ||
| 2nd (2nd leg) | AFC Ajax | - | Nentori Tiranë | 2:0 (1:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: AFC Ajax | ||||
| 1st(1st leg) | Atlético Madrid | - | Austria Wien | 2:0 (1:0) | ||
| 2nd (2nd leg) | Austria Wien | - | Atlético Madrid | 1:2 (1:1) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Atlético Madrid | ||||
| 1st(1st leg) | Újpesti Dózsa SC | - | Crvena Zvezda | 2:0 (0:0) | ||
| 2nd (2nd leg) | Crvena Zvezda | - | Újpesti Dózsa SC | 4:0 (3:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Crvena Zvezda | ||||
| 1st(1st leg) | Cagliari Calcio | - | AS Saint-Étienne | 3:0 (2:0) | ||
| 2nd (2nd leg) | AS Saint-Étienne | - | Cagliari Calcio | 1:0 (1:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Cagliari Calcio | ||||
| 1st(1st leg) | Celtic FC | - | KPV Kokkola | 9:0 (6:0) | ||
| 2nd (2nd leg) | KPV Kokkola | - | Celtic FC | 0:5 (0:2) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Celtic FC | ||||
| 1st(1st leg) | Jeunesse Esch | - | Panathinaikos | 1:2 (1:2) | ||
| 2nd (2nd leg) | Panathinaikos | - | Jeunesse Esch | 5:0 (4:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Panathinaikos | ||||
| 1st(1st leg) | Glentoran FC | - | Waterford AFC | 1:3 (1:1) | ||
| 2nd (2nd leg) | Waterford AFC | - | Glentoran FC | 1:0 (0:0) | ||
| 1st(1st leg): 16/09/1970 | 2nd (2nd leg): 30/09/1970 | Winner: Waterford AFC | ||||
