| Yellow | VS Club | Date | Sections | |
|---|---|---|---|---|
| 3 | Athletic Bilbao | 19-10-2017 | Group Stage | Match details |
| 3 | FC Zorya Luhansk | 14-09-2017 | Group Stage | Match details |
| 2 | Arsenal | 22-02-2018 | Round of 32 | Match details |
| 1 | Hertha BSC | 07-12-2017 | Group Stage | Match details |
| 1 | FC Zorya Luhansk | 23-11-2017 | Group Stage | Match details |
