PSV had a goal ruled out 12 minutes in at the Georgios Karaiskakis Stadium for an obvious offside call on Ismael Saibari, and Gelson Martins fired Olympiacos ahead just five minutes later. Chiquinho played a lofted through ball over the top for Martins, who slammed a powerful finish into the roof of the net to give Matej Kovar absolutely no chance.