Midfielders: Danilo, Fabian Ruiz, Warren Zaire-Emery
Back to Danilo, expect him to start this game whether that is a defensive pivot or in the middle/mid-left of a three-man backline flanked by the wing-backs.
With Marco Verratti out and suspended for the game against Nantes (yellow card accumulation), Galtier will need to make tough decisions about who to use in the middle of the park next to Danilo and to generate some offensive play from the Parisian basement.
One possibility would see youngster Warren Zaire-Emery paired with Fabian Ruiz to create from deep and launch the offense trio--whoever makes it.
Ruiz and WZE are both athletic and can roam ample parts of the pitch, so that's a positive. Also, having Danilo commanding the defensive line and sitting in front of it would also help free Ruiz/WZE from having to pay much defensive attention to the opposition, focusing more on launching offensive transitions.
Vitinha is the obvious odd man out in this scenario, and while he's shown flashes of higher quality than Ruiz and WZE, the truth is that he has struggled mightily all year long in matches in which he's not played next to Marco Verratti. With the Italian out for this one but surely playing on Wednesday, Galtier might opt to rest Vitinha too, and use that pair at Bayern Munich next.