Real Madrid coach Zinedine Zidane admits he's unsure if Sergio Ramos will stay.

A dispute over contract promises all but sealed Cristiano Ronaldo's departure to Juventus after a trophy-laden career in the Spanish capital, and fans are afraid that they will lose yet another talismanic figure.

"Are we going to have a Cristiano case? I don't know what will happen with Ramos," Zidane explained in his pre-match press conference.

"He is here with us at the moment.

"We're just focused on tomorrow's game."

Karim Benzema is a player also causing headaches for Zidane, not for his performances on the pitch, but the fact the forward has been called to trial in France over an alleged blackmail plot.

"He has my full support," he added.

"This is not an easy situation, that's clear, but I see that he is fine and concentrating on his work.

"I hope that this will get fixed for everyone, Karim works hard and that's what he enjoys doing."