| Yellow | Clubs | VS Club | Date | Sections | |
|---|---|---|---|---|---|
| 7 | Toulouse | Benfica | 15-02-2024 | Knockout Phase | Match details |
| 5 | Sparta Prague | Galatasaray SK | 15-02-2024 | Knockout Phase | Match details |
| 5 | BSC Young Boys | Sporting Lisbon | 15-02-2024 | Knockout Phase | Match details |
| 4 | Shakhtar Donetsk | Olympique Marseille | 15-02-2024 | Knockout Phase | Match details |
| 3 | Atalanta | Sporting Lisbon | 06-03-2024 | Round of 16 | Match details |
| 3 | Feyenoord | AS Roma | 15-02-2024 | Knockout Phase | Match details |
| 3 | RC Lens | SC Freiburg | 15-02-2024 | Knockout Phase | Match details |
| 3 | Villarreal | Maccabi Haifa | 06-12-2023 | Group section | Match details |
| 2 | AS Roma | Feyenoord | 15-02-2024 | Knockout Phase | Match details |
| 2 | Qarabag FK | Sporting Braga | 15-02-2024 | Knockout Phase | Match details |
