| Red | Clubs | VS Club | Date | Sections | |
|---|---|---|---|---|---|
| 2 | OGC Nice | Napoli | 16-08-2017 | Play-off round | Match details |
| 2 | Vikingur Gota | FH Hafnarfjordur | 18-07-2017 | Second Round | Match details |
| 2 | Europa FC | The New Saints FC | 04-07-2017 | First Round | Match details |
| 1 | HNK Rijeka | Olympiakos | 16-08-2017 | Play-off round | Match details |
| 1 | Steaua Bucharest | Sporting Lisbon | 15-08-2017 | Play-off round | Match details |
| 1 | Hapoel Be`er Sheva | Ludogorets Razgrad | 02-08-2017 | Third round | Match details |
| 1 | FC Copenhagen | FK Vardar | 02-08-2017 | Third round | Match details |
| 1 | Viktoria Plzen | Steaua Bucharest | 02-08-2017 | Third round | Match details |
| 1 | Ludogorets Razgrad | Hapoel Be`er Sheva | 02-08-2017 | Third round | Match details |
| 1 | Viitorul Constanta | APOEL Nicosia | 26-07-2017 | Third round | Match details |
