They are six points clear at the top of the table and are heavy favourites to beat Palace, who are struggling down in 16th.
“This is a difficult game, and I don’t think Chelsea are scoring enough goals at the minute”
He told Sky Sports: “I know Palace haven’t enjoyed the best of times recently, and Chelsea are playing well, but this will be a hard game for Chelsea.
“For me, it all depends on Wilfried Zaha. The way of beating this three-at-the-back system is to get the ball out wide. They can give Chelsea a bit of a scare if they do.
“If you look at Chelsea’s last two games, they haven’t blown teams away.
“They fell over the line against West Brom, who deserved a draw and then a world class save stopped Sunderland getting a point.
“This is a difficult game, and I don’t think Chelsea are scoring enough goals at the minute. Draw.”
Eden Hazard is fit to play after missing the Sunderland clash with a knock.
However, Antonio Conte admitted at his pre-match press conference that he faces a decision over whether to restore the Belgian to the starting XI.