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| 1st(1st leg) | Red Boys Differdange | - | AC Milan | 1:4 (0:3) | ||
| 2nd (2nd leg) | AC Milan | - | Red Boys Differdange | 3:0 (2:0) | ||
| 1st(1st leg): 06/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: AC Milan | ||||
| 1st(1st leg) | Pezoporikos Larnaca | - | Cork Hibernians | 1:2 (0:1) | ||
| 2nd (2nd leg) | Cork Hibernians | - | Pezoporikos Larnaca | 4:1 (2:0) | ||
| 1st(1st leg): 10/09/1972 | 2nd (2nd leg): 13/09/1972 | Winner: Cork Hibernians | ||||
| 1st(1st leg) | Sporting CP | - | Hibernian FC | 2:1 (0:0) | ||
| 2nd (2nd leg) | Hibernian FC | - | Sporting CP | 6:1 (1:1) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Hibernian FC | ||||
| 1st(1st leg) | BK Fremad Amager | - | KS Besa | 1:1 (0:1) | ||
| 2nd (2nd leg) | KS Besa | - | BK Fremad Amager | 0:0 (0:0) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: KS Besa | ||||
| 1st(1st leg) | Standard Liège | - | TJ Sparta ČKD Praha | 1:0 (0:0) | ||
| 2nd (2nd leg) | TJ Sparta ČKD Praha | - | Standard Liège | 4:2 (1:1) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: TJ Sparta ČKD Praha | ||||
| 1st(1st leg) | Hajduk Split | - | Fredrikstad FK | 1:0 (1:0) | ||
| 2nd (2nd leg) | Fredrikstad FK | - | Hajduk Split | 0:1 (0:1) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Hajduk Split | ||||
| 1st(1st leg) | Rapid Bucureşti | - | Landskrona BoIS | 3:0 (1:0) | ||
| 2nd (2nd leg) | Landskrona BoIS | - | Rapid Bucureşti | 1:0 (1:0) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Rapid Bucureşti | ||||
| 1st(1st leg) | FC Zürich | - | Wrexham AFC | 1:1 (0:0) | ||
| 2nd (2nd leg) | Wrexham AFC | - | FC Zürich | 2:1 (0:0) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Wrexham AFC | ||||
| 1st(1st leg) | Rapid Wien | - | PAOK Saloniki | 0:0 (0:0) | ||
| 2nd (2nd leg) | PAOK Saloniki | - | Rapid Wien | 2:2 (1:2) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Rapid Wien | ||||
| 1st(1st leg) | MKE Ankaragücü | - | Leeds United | 1:1 (0:1) | ||
| 2nd (2nd leg) | Leeds United | - | MKE Ankaragücü | 1:0 (0:0) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Leeds United | ||||
| 1st(1st leg) | Spartak Moskva | - | FC Den Haag-ADO | 1:0 (0:0) | ||
| 2nd (2nd leg) | FC Den Haag-ADO | - | Spartak Moskva | 0:0 (0:0) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Spartak Moskva | ||||
| 1st(1st leg) | Víkingur Reykjavík | - | Legia Warszawa | 0:2 (0:0) | ||
| 2nd (2nd leg) | Legia Warszawa | - | Víkingur Reykjavík | 9:0 (3:0) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Legia Warszawa | ||||
| 1st(1st leg) | FC Carl Zeiss Jena | - | MP Mikkeli | 6:1 (1:1) | ||
| 2nd (2nd leg) | MP Mikkeli | - | FC Carl Zeiss Jena | 3:2 (2:1) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: FC Carl Zeiss Jena | ||||
| 1st(1st leg) | FC Schalke 04 | - | Slavia Sofia | 2:1 (1:0) | ||
| 2nd (2nd leg) | Slavia Sofia | - | FC Schalke 04 | 1:3 (0:2) | ||
| 1st(1st leg): 13/09/1972 | 2nd (2nd leg): 28/09/1972 | Winner: FC Schalke 04 | ||||
| 1st(1st leg) | SC Bastia | - | Atlético Madrid | 0:0 (0:0) | ||
| 2nd (2nd leg) | Atlético Madrid | - | SC Bastia | 2:1 (1:1) | ||
| 1st(1st leg): 14/09/1972 | 2nd (2nd leg): 26/09/1972 | Winner: Atlético Madrid | ||||
| 1st(1st leg) | Floriana FC | - | Ferencvárosi TC | 1:0 (1:0) | ||
| 2nd (2nd leg) | Ferencvárosi TC | - | Floriana FC | 6:0 (3:0) | ||
| 1st(1st leg): 20/09/1972 | 2nd (2nd leg): 27/09/1972 | Winner: Ferencvárosi TC | ||||
