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| 1st(1st leg) | 1. FC Lokomotive Leipzig | - | RFC Liège | 0:0 (0:0) | ||
| 2nd (2nd leg) | RFC Liège | - | 1. FC Lokomotive Leipzig | 1:2 (0:1) | ||
| 1st(1st leg): 12/10/1966 | 2nd (2nd leg): 01/11/1966 | Winner: 1. FC Lokomotive Leipzig | ||||
| 1st(1st leg) | DWS Amsterdam | - | Leeds United | 1:3 (0:2) | ||
| 2nd (2nd leg) | Leeds United | - | DWS Amsterdam | 5:1 (3:0) | ||
| 1st(1st leg): 18/10/1966 | 2nd (2nd leg): 26/10/1966 | Winner: Leeds United | ||||
| 1st(1st leg) | Lausanne Sports | - | Burnley FC | 1:3 (1:2) | ||
| 2nd (2nd leg) | Burnley FC | - | Lausanne Sports | 5:0 (2:0) | ||
| 1st(1st leg): 19/10/1966 | 2nd (2nd leg): 25/10/1966 | Winner: Burnley FC | ||||
| 1st(1st leg) | KAA Gent | - | Girondins Bordeaux | 1:0 (0:0) | ||
| 2nd (2nd leg) | Girondins Bordeaux | - | KAA Gent | 0:0 (0:0) | ||
| 1st(1st leg): 19/10/1966 | 2nd (2nd leg): 25/10/1966 | Winner: KAA Gent | ||||
| 1st(1st leg) | Toulouse FC | - | Dinamo Pitești | 3:0 (3:0) | ||
| 2nd (2nd leg) | Dinamo Pitești | - | Toulouse FC | 5:1 (1:1) | ||
| 1st(1st leg): 19/10/1966 | 2nd (2nd leg): 26/10/1966 | Winner: Dinamo Pitești | ||||
| 1st(1st leg) | Örgryte IS | - | Ferencvárosi TC | 0:0 (0:0) | ||
| 2nd (2nd leg) | Ferencvárosi TC | - | Örgryte IS | 7:1 (3:0) | ||
| 1st(1st leg): 19/10/1966 | 2nd (2nd leg): 02/11/1966 | Winner: Ferencvárosi TC | ||||
| 1st(1st leg) | B 1909 Odense | - | SSC Napoli | 1:4 (0:2) | ||
| 2nd (2nd leg) | SSC Napoli | - | B 1909 Odense | 2:1 (0:1) | ||
| 1st(1st leg): 25/10/1966 | 2nd (2nd leg): 02/11/1966 | Winner: SSC Napoli | ||||
| 1st(1st leg) | Royal Antwerp FC | - | Kilmarnock FC | 0:1 (0:1) | ||
| 2nd (2nd leg) | Kilmarnock FC | - | Royal Antwerp FC | 7:2 (3:0) | ||
| 1st(1st leg): 25/10/1966 | 2nd (2nd leg): 02/11/1966 | Winner: Kilmarnock FC | ||||
| 1st(1st leg) | Valencia CF | - | Crvena Zvezda | 1:0 (0:0) | ||
| 2nd (2nd leg) | Crvena Zvezda | - | Valencia CF | 1:2 (0:2) | ||
| 1st(1st leg): 25/10/1966 | 2nd (2nd leg): 03/11/1966 | Winner: Valencia CF | ||||
| 1st(1st leg) | FC Barcelona | - | Dundee United | 1:2 (0:1) | ||
| 2nd (2nd leg) | Dundee United | - | FC Barcelona | 2:0 (1:0) | ||
| 1st(1st leg): 25/10/1966 | 2nd (2nd leg): 16/11/1966 | Winner: Dundee United | ||||
| 1st(1st leg) | Spartak Plovdiv | - | SL Benfica | 1:1 (1:1) | ||
| 2nd (2nd leg) | SL Benfica | - | Spartak Plovdiv | 3:0 (0:0) | ||
| 1st(1st leg): 25/10/1966 | 2nd (2nd leg): 16/11/1966 | Winner: SL Benfica | ||||
| 1st(1st leg) | Dunfermline Athletic | - | Dinamo Zagreb | 4:2 (1:1) | ||
| 2nd (2nd leg) | Dinamo Zagreb | - | Dunfermline Athletic | 2:0 (1:0) | ||
| 1st(1st leg): 26/10/1966 | 2nd (2nd leg): 02/11/1966 | Winner: Dinamo Zagreb | ||||
| 1st(1st leg) | TJ Sparta ČKD Praha | - | Bologna FC | 2:2 (1:1) | ||
| 2nd (2nd leg) | Bologna FC | - | TJ Sparta ČKD Praha | 2:1 (1:1) | ||
| 1st(1st leg): 26/10/1966 | 2nd (2nd leg): 27/11/1966 | Winner: Bologna FC | ||||
| 1st(1st leg) | DOS Utrecht | - | West Bromwich Albion | 1:1 (0:1) | ||
| 2nd (2nd leg) | West Bromwich Albion | - | DOS Utrecht | 5:2 (1:0) | ||
| 1st(1st leg): 02/11/1966 | 2nd (2nd leg): 09/11/1966 | Winner: West Bromwich Albion | ||||
| 1st(1st leg) | Frankfurter SG Eintracht | - | Hvidovre IF | 5:1 (1:1) | ||
| 2nd (2nd leg) | Hvidovre IF | - | Frankfurter SG Eintracht | 2:2 (2:1) | ||
| 1st(1st leg): 09/11/1966 | 2nd (2nd leg): 16/11/1966 | Winner: Frankfurter SG Eintracht | ||||
| 1st(1st leg) | Juventus | - | Vitória Setúbal | 3:1 (0:1) | ||
| 2nd (2nd leg) | Vitória Setúbal | - | Juventus | 0:2 (0:1) | ||
| 1st(1st leg): 09/11/1966 | 2nd (2nd leg): 30/11/1966 | Winner: Juventus | ||||
