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| 1st(1st leg) | Feyenoord | - | AS Roma | 1:1 (1:0) | ||
| 2nd (2nd leg) | AS Roma | - | Feyenoord | 4:2 (1:1, 1:1, 1:1) pso | ||
| 1st(1st leg): 15/02/2024 17:45 | 2nd (2nd leg): 22/02/2024 20:00 | Winner: AS Roma | ||||
| 1st(1st leg) | BSC Young Boys | - | Sporting CP | 1:3 (1:2) | ||
| 2nd (2nd leg) | Sporting CP | - | BSC Young Boys | 1:1 (1:0) | ||
| 1st(1st leg): 15/02/2024 17:45 | 2nd (2nd leg): 22/02/2024 20:00 | Winner: Sporting CP | ||||
| 1st(1st leg) | Galatasaray | - | AC Sparta Praha | 3:2 (1:0) | ||
| 2nd (2nd leg) | AC Sparta Praha | - | Galatasaray | 4:1 (1:1) | ||
| 1st(1st leg): 15/02/2024 17:45 | 2nd (2nd leg): 22/02/2024 20:00 | Winner: AC Sparta Praha | ||||
| 1st(1st leg) | Shakhtar Donetsk | - | Olympique Marseille | 2:2 (0:0) | ||
| 2nd (2nd leg) | Olympique Marseille | - | Shakhtar Donetsk | 3:1 (1:1) | ||
| 1st(1st leg): 15/02/2024 17:45 | 2nd (2nd leg): 22/02/2024 20:00 | Winner: Olympique Marseille | ||||
| 1st(1st leg) | AC Milan | - | Stade Rennais | 3:0 (1:0) | ||
| 2nd (2nd leg) | Stade Rennais | - | AC Milan | 3:2 (1:1) | ||
| 1st(1st leg): 15/02/2024 20:00 | 2nd (2nd leg): 22/02/2024 17:45 | Winner: AC Milan | ||||
| 1st(1st leg) | RC Lens | - | SC Freiburg | 0:0 (0:0) | ||
| 2nd (2nd leg) | SC Freiburg | - | RC Lens | 3:2 (0:2, 2:2) aet | ||
| 1st(1st leg): 15/02/2024 20:00 | 2nd (2nd leg): 22/02/2024 17:45 | Winner: SC Freiburg | ||||
| 1st(1st leg) | SL Benfica | - | Toulouse FC | 2:1 (0:0) | ||
| 2nd (2nd leg) | Toulouse FC | - | SL Benfica | 0:0 (0:0) | ||
| 1st(1st leg): 15/02/2024 20:00 | 2nd (2nd leg): 22/02/2024 17:45 | Winner: SL Benfica | ||||
| 1st(1st leg) | Sporting Braga | - | Qarabağ FK | 2:4 (1:1) | ||
| 2nd (2nd leg) | Qarabağ FK | - | Sporting Braga | 2:3 (0:0, 0:2) aet | ||
| 1st(1st leg): 15/02/2024 20:00 | 2nd (2nd leg): 22/02/2024 17:45 | Winner: Qarabağ FK | ||||
