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| 1st(1st leg) | Olympiakos Piraeus | - | Fenerbahçe | 3:2 (2:0) | ||
| 2nd (2nd leg) | Fenerbahçe | - | Olympiakos Piraeus | 2:3 (1:0, 1:0, 1:0) pso | ||
| 1st(1st leg): 11/04/2024 17:45 | 2nd (2nd leg): 18/04/2024 20:00 | Winner: Olympiakos Piraeus | ||||
| 1st(1st leg) | Viktoria Plzeň | - | ACF Fiorentina | 0:0 (0:0) | ||
| 2nd (2nd leg) | ACF Fiorentina | - | Viktoria Plzeň | 2:0 (0:0, 0:0) aet | ||
| 1st(1st leg): 11/04/2024 17:45 | 2nd (2nd leg): 18/04/2024 17:45 | Winner: ACF Fiorentina | ||||
| 1st(1st leg) | Club Brugge KV | - | PAOK Saloniki | 1:0 (1:0) | ||
| 2nd (2nd leg) | PAOK Saloniki | - | Club Brugge KV | 0:2 (0:2) | ||
| 1st(1st leg): 11/04/2024 20:00 | 2nd (2nd leg): 18/04/2024 20:00 | Winner: Club Brugge KV | ||||
| 1st(1st leg) | Aston Villa | - | Lille OSC | 2:1 (1:0) | ||
| 2nd (2nd leg) | Lille OSC | - | Aston Villa | 3:4 (1:0, 2:1, 2:1) pso | ||
| 1st(1st leg): 11/04/2024 20:00 | 2nd (2nd leg): 18/04/2024 17:45 | Winner: Aston Villa | ||||
