Ronaldo was a big hit at Manchester United during his six years at the club.
The Portugal star won three league titles as well as the Champions League, FA Cup and League Cup before leaving for Real Madrid in the summer of 2009.
Despite his exit, Ronaldo remains a popular figure among the United faithful.
The Real Madrid forward played alongside Rio Ferdinand during his time at Old Trafford.
And Ferdinand has recalled how he would often humiliate the Neville brothers in training.
Sir Alex Ferguson congratulates Cristiano Ronaldo after Euro 2016 triumph
Mon, July 11, 2016
Sir Alex Ferguson was quick to congratulate Cristiano Ronaldo after his Euro 2016 triumph with Portugal in the final against France
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Former Manchester United manager Sir Alex Ferguson was quick to congratulate Cristiano Ronaldo after Portugal won Euro 2016
Cristiano Ronaldo loved to humiliate his Manchester United team-mates
Cristiano Ronaldo won three league titles during his time at Manchester United
“He liked taking liberties when he first came," Ferdinand told Four Four Two.
“Taking people on, making people look silly, doing skills, coming back to beat them again.
"Gary Neville was probably the butt of them, and Phil too. He would do that continuously.
"Sometimes it was about tough love – kick him, make him feel it, make him understand that sometimes you've got to release the ball at the right times. The best players get that quicker than others."
Ferdinand also believes Ronaldo was the key to Portugal’s shock Euro 2016 triumph last year.
Cristiano Ronaldo would often humiliate Gary Neville
The 32-year-old was subbed in the final after injuring his ankle but masterminded his country’s success from the touchline.
“I said it during the tournament on TV – without him they wouldn’t have even got to the Euros, and then during that tournament there were times when if he wasn’t on that pitch they wouldn’t have gone any further,” Ferdinand added.
“He’s got that drive and determination to drag teams over the line – I’ve been part of a team he’s done that with a couple of times. He’s got an inner belief that he’s the man to do it. He wants that responsibility.
“Sure, it was funny when he was in the technical area during the final shouting instructions, but that’s just passion and why I think he gets hammered now and again by certain people.
“People love him, but there are people that hate him too.
“But they don’t understand that passion. People just think that because you play football your passion is meant to be put to one side, and you’re meant to act in a certain way. No. Fans act in crazy ways too – and don’t forget that players are fans first and foremost as well, so they’re going to act different.”