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| 1st(1st leg) | AS Roma | - | IFK Göteborg | 3:0 (0:0) | ||
| 2nd (2nd leg) | IFK Göteborg | - | AS Roma | 2:1 (1:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: AS Roma | ||||
| 1st(1st leg) | Lech Poznań | - | Athletic Bilbao | 2:0 (2:0) | ||
| 2nd (2nd leg) | Athletic Bilbao | - | Lech Poznań | 4:0 (2:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Athletic Bilbao | ||||
| 1st(1st leg) | SL Benfica | - | Linfield FC | 3:0 (0:0) | ||
| 2nd (2nd leg) | Linfield FC | - | SL Benfica | 2:3 (1:2) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: SL Benfica | ||||
| 1st(1st leg) | Dinamo Minsk | - | Grasshopper Club Zürich | 1:0 (1:0) | ||
| 2nd (2nd leg) | Grasshopper Club Zürich | - | Dinamo Minsk | 2:2 (1:1) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Dinamo Minsk | ||||
| 1st(1st leg) | Athlone Town | - | Standard Liège | 2:3 (1:2) | ||
| 2nd (2nd leg) | Standard Liège | - | Athlone Town | 8:2 (4:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Standard Liège | ||||
| 1st(1st leg) | AFC Ajax | - | Olympiakos Piraeus | 0:0 (0:0) | ||
| 2nd (2nd leg) | Olympiakos Piraeus | - | AFC Ajax | 2:0 (0:0, 0:0) aet | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Olympiakos Piraeus | ||||
| 1st(1st leg) | Odense BK | - | Liverpool FC | 0:1 (0:1) | ||
| 2nd (2nd leg) | Liverpool FC | - | Odense BK | 5:0 (3:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Liverpool FC | ||||
| 1st(1st leg) | CSKA Sofia | - | Omonia Nikosia | 3:0 (0:0) | ||
| 2nd (2nd leg) | Omonia Nikosia | - | CSKA Sofia | 4:1 (1:1) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: CSKA Sofia | ||||
| 1st(1st leg) | Raba ETO Győr | - | Víkingur Reykjavík | 2:1 (1:1) | ||
| 2nd (2nd leg) | Víkingur Reykjavík | - | Raba ETO Győr | 0:2 (0:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Raba ETO Győr | ||||
| 1st(1st leg) | Partizan | - | Viking FK | 5:1 (3:1) | ||
| 2nd (2nd leg) | Viking FK | - | Partizan | 0:0 (0:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Partizan | ||||
| 1st(1st leg) | Hamrun Spartans | - | Dundee United | 0:3 (0:2) | ||
| 2nd (2nd leg) | Dundee United | - | Hamrun Spartans | 3:0 (2:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Dundee United | ||||
| 1st(1st leg) | BFC Dynamo | - | Jeunesse Esch | 4:1 (2:1) | ||
| 2nd (2nd leg) | Jeunesse Esch | - | BFC Dynamo | 0:2 (0:1) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: BFC Dynamo | ||||
| 1st(1st leg) | Fenerbahçe | - | TJ Bohemians ČKD Praha | 0:1 (0:0) | ||
| 2nd (2nd leg) | TJ Bohemians ČKD Praha | - | Fenerbahçe | 4:0 (1:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: TJ Bohemians ČKD Praha | ||||
| 1st(1st leg) | FC Kuusysi (old) | - | Dinamo Bucureşti | 0:1 (0:0) | ||
| 2nd (2nd leg) | Dinamo Bucureşti | - | FC Kuusysi (old) | 3:0 (0:0) | ||
| 1st(1st leg): 14/09/1983 | 2nd (2nd leg): 28/09/1983 | Winner: Dinamo Bucureşti | ||||
| 1st(1st leg) | Rapid Wien | - | FC Nantes | 3:0 (2:0) | ||
| 2nd (2nd leg) | FC Nantes | - | Rapid Wien | 3:1 (2:1) | ||
| 1st(1st leg): 14/09/1983 18:30 | 2nd (2nd leg): 28/09/1983 19:00 | Winner: Rapid Wien | ||||
