PSG currently hold a 2-1 advantage after the first leg and Ancelotti has said that his players must "show the same attitude" when the fixture recommences.
"Our performance was very good; we controlled the match well," Ligue1.com quotes Ancelotti as saying. "Adil Rami's goal changed things a bit but not the team's performance.
"All my players worked hard together; we won a lot of balls and moved forward quickly.
"We're at the half-way point of the tie now. We had a good first half and we need to show the same attitude in Paris, which won't be easy."
PSG are currently six points clear at the top of Ligue 1.