Another of Ronaldo's old clubs, Barcelona, are also keen on the Brazil international.
"Both options are great, but I still hope he goes to Real Madrid, where I spent five years," Ronaldo told Terra. "I think it would be better for him.
"Brazil has become too small for Neymar.
"This is his moment and he needs to have the ambition to conquer the world, rather than just be the best in Brazil."