Ronaldo is confident Real, who are currently two points behind Barcelona, will be able to win.
He told AS: “It is going to be a very difficult game, but we are playing in the Bernabeu, and we have to win if we want to win the league.
“They are one of the strongest teams. I could not play against them earlier in the season.
“But I am ready for this one.
“I am in good form, and I expect to continue like this until the World Cup.”