He believes that the exertions against Valencia in their midweek Champions League tie could be a factor, but said that his team are fired up for the match.
"This match has come at a very important time for the club, just three days after Valencia and it won't be easy to manage," Ancelotti told the club's official website. "Especially on a physical level after all the efforts of Wednesday.
"It won't be easy because every team in Ligue 1 is very well organised. Anything can happen in football, but our recent experiences in losing to Sochaux and Reims will serve as important lessons for us on Saturday.
"After these two defeats, the players have taken their responsibilities and are ready to produce a big match and win at home."
Les Parisiens are two points clear of second-placed Lyon.