| Yellow | VS Club | Date | Sections | |
|---|---|---|---|---|
| 4 | Sporting Lisbon | 19-10-2021 | Group Stage | Match details |
| 3 | Sporting Lisbon | 03-11-2021 | Group Stage | Match details |
| 3 | Borussia Dortmund | 15-09-2021 | Group Stage | Match details |
| 2 | Borussia Dortmund | 07-12-2021 | Group Stage | Match details |
| 2 | AFC Ajax | 28-09-2021 | Group Stage | Match details |
| 1 | AFC Ajax | 24-11-2021 | Group Stage | Match details |
