Scolari, who coached Ronaldo for Portugal between 2003 and 2008, was full of praise for the Madrid striker, and admitted that people are "jealous" of him.
"Some people do not like him because he is a great player, good-looking and has sex with all the ladies. People get jealous," Scolari told Arena SporTV.
"The only bad thing about Ronaldo's life is Messi. If it was not for him, Ronaldo would be the best player in the world for five years in a row.
"He is a great person and a friend. He likes to fool around, but he is a great professional."
Ronaldo has scored 53 goals this season.