"If you were asked for advice by your son, you'd give him the best advice and the worst thing Ronaldo could do is to go to Real Madrid," Fergie has said.
"He's at the right club and a fantastic football club.
"In the modern day, young lads can be twisted by the talk of money, but if you saw Ronaldo after the Champions League Final, he was the happiest boy in the world.
"I genuinely believe that I know what the best club in the world is for him and that's Manchester United.
"When you have young players, you want the best for them and you want to do the best for them."