Full-time: Marseille 0-3 Man City
The visitors dominated from the outset, with Ferran Torres opening the scoring after Kevin de Bruyne got in behind the Marseille defence and squared for a tap-in.
Oleksandr Zinchenko clipped the outside of a post with a neat strike from the edge of the box as City pushed to get a second before half-time.
Marseille rarely troubled Ederson in the City goal. Nemanja Radonjic’s speculative effort from 30 yards was easily saved, while Florian Thauvin hit the outside of a post after the break, although Ederson had it covered.
As the hosts tired, City stepped up a gear and wrapped up the win in style as Ilkay Gundogan stabbed in from Raheem Sterling’s knockdown before Sterling tapped home from another De Bruyne assist.