Ronaldo has said that Mourinho will try to win more trophies until the end of the season but leaving then could "be best for him".
"I think that will continue at least until end of season, because he's a coach who always wants to win and we have many challenges ahead that can be achieved," Ronaldo told AS.
"Then [he could] decide what is best for him and the club. I do not know what he or the club thinks and I prefer not to talk about it."
Real Madrid host Sevilla in La Liga on Saturday.