1. PSG was great, but Marseille's awful game plan also helped
Whatever Igor Tudor (Olympique Marseille's coach) was thinking about how to stop Kylian Mbappe in particular and PSG as a whole truly didn't work. It was a nonsensical game plan and it showed from the get-go.
Tudor and Marseille decided to go with a man-marking style of defense in which each of their center-backs marked Mbappe and Lionel Messi closely and followed them all across the pitch, up and down, left to right. The same approach was used in the midfield to defend Vitinha and Fabian Ruiz, the two most advanced midfielders on PSG's lineup.
Obviously, that generated huge gaps between the defenders and the midfielders of Marseille with Mbappe and Messi staying really high up the pitch. And do you know what happens when Messi drops a bit and Mbappe gets isolated ahead of him facing a one-vs-one against a defender? Ask Tudor.
PSG exploited the gaps, used long passes to the space, had an inspired Messi and a murderous Mbappe on the field, and enjoyed the trip to Marseille hanging three goals on their Classique rivals and pretty much wrapping up the Ligue 1 title.
As surprising as it is to write considering the bad overall season of Paris Saint-Germain and the defeat at OM a few days ago, Galtier bossed Tudor on Sunday's 3-0 win on the road.