Barcelona v Olympiakos, 18 October 2017
| Score | 3-1 to Barcelona |
| Referee | Willie Collum |
| Competition | UEFA Champions League Group D |
| Venue | Camp Nou, Barcelona |
| Attendance | 55,026 |
Kick-off: 8.45pm local (7.45pm BST)
3 Barcelona
Manager: Ernesto Valverde
1 Olympiakos
Manager: Takis Lemonis