Zidane is set to re-join the Spanish giants as an advisor this summer, if Florentino Perez is named as the club’s new president.
He said: “Ronaldo is a great player, of course, because he was chosen for the Golden Ball and could achieve it again this year.
“He is a formidable player but if you ask me who I prefer, it is very clear I would pick Ribery.”
He added: “If Perez is elected, I am willing to do anything to help Real Madrid.
“There are many issues that need to be resolved.”