The 25-year-old joined Real in a world record £80million deal from Manchester United last summer.
“I’m sure we will win the league,” said Ronaldo.
“We only have to worry about ourselves and continue doing the same as we are now. We believe in our chances.”
“The game against Barcelona at home could be key, but we’re still not thinking about this date and we are only taking it game by game and trying to improve every day,” Ronaldo added.