Former Manchester United star Ronaldo has been praised for his unselfish play in recent weeks.
But he told AS: "You cannot live thinking about the criticism of others, you have to think about yourself and concentrate on football.
"I do not worry after a game nor the next day listening to the radio or reading the newspaper. I will continue working in the same way no matter who criticizes me or not.
"The coach is the one who decides how I have to play. If I do good things, my family, the fans and I will be very happy."