In an enthralling encounter, Royale Union Saint-Gilloise ultimately fell short as Olympique de Marseille edged them 3-2 at the Den Dreef. The visitors dominated with a first-half strike from Alexis Sanchez and two goals in the second half from Cengiz Ünder and Luis Henrique. The loss sees Union Saint-Gilloise slip to the bottom of their UEFA Champions League group, while Olympique de Marseille leapfrog to second position.