Roberto Carlos said: “Yes, without a doubt.
“Now he is one of the five best in the world, but if he was to play for Real Madrid he’d become number one.
“This is where the best football is played, the games in Spain are shown worldwide on television and he will improve the most here. To be the best he must sign for Madrid.
“To pay £50 million for Ronaldo is the right thing, because he is worth the trouble.”