The Italian says his side are focused solely on beating Lorient, and is hoping that Auxerre will be able to pull off a shock against Montpellier
The Parisians were cruising for much of the campaign, but a poor run of form saw them slip behind surprise package Montpellier.
The capital club now sit three points behind Rene Girard's side with one game remaining, and they must hope that the league leaders fail to beat already-relegated Auxerre on Sunday.
"Objectively, we don't have much of a chance," Ancelotti conceded to the club's official website. "Our job is to win - it's the only chance we have.
"We have to beat Lorient, but that won't be easy because they really need the points. We will be motivated. We want to finish the season well and then we'll see what happens at Auxerre.
"Auxerre have nothing to lose. Montpellier is playing for the title. Montpellier have the quality and motivation, but football is strange sometimes.
"I'm a catholic, but I think that God has things to think about other than Paris Saint-Germain."
Ancelotti will be without the services of the suspended Jeremy Menez for the final day of the season, and confirmed that Kevin Gameiro will take the former Roma man's place in attack.
"Kevin Gamerio [will fill in]. The fact that he wasn't selected for Euro 2012 means that he is motivated to show his quality."
The clash between Paris Saint-Germain and Lorient kicks off at 21.00CET on Sunday.