Our French football spy, Bruno Rozga, looks at Marseille's changing tactics in recent months...
Tactically, Marseille are very dependent on their star player and playmaker, the Argentinian Lucho Gonzalez. What he lacks in pace he makes up for in his sharp reading of the game: he’s usually in the right place at the right time, is often first to the second ball and is also good in the air.
The question of his deployment at the moment is tactical. Marseille have recently been playing 4-1-2-3, with Lucho roving behind the attacking trio of Loic Remy, Brandao and André-Pierre Gignac in the absence of injured playmaker Mathieu Valbuena.
Meanwhile, Deschamps employs more defensive midfielders such as Benoit Cheyrou, Edouard Cisse and Charles Kabore to break up play and supply the tricky Argentinian. The recent move of Gignac to the left of a front three had worked well, but without him it will be intriguing to see how the Marseille boss sets up.
A forward-thinking philosophy has served Deschamps well of late – with four wins in five lifting the team to third in Ligue 1 – but they are still not prolific in front of goal. And notably, in the 1-0 win against Chelsea in their final group game, they played 4-5-1. United may have to work hard to break this team down.