The former Sao Paulo star is in awe of the Portugal star and says he is very happy with his progress at Madrid this season
The Brazilian midfielder joined Madrid from Sao Paulo in January 2013 and he has made it clear that Ronaldo's support has helped him adapt to his new surroundings in the past few months.
"He’s one of my best mates at the club. He loves Brazil and he gets on very well with the Brazilians. He’s a ten-out-of-ten guy, and he’s always been there to help me out," the 21-year-old told UOL.
"Not to mention the fact that he’s an example to everyone. He is always early for training and gives everything for his club."
Casemiro then went on to stress that he's very happy with life at Madrid and is keen to make a name for himself at the Spanish giants.
"I’m very happy. This is my first year in Spain and I’m enjoying some great experiences, playing frequently and learning every day.
"However, I keep my feet on the ground and I know that I need to keep on working every day to win the confidence of everyone at the club."
The midfielder has made three appearances in La Liga so far this term.