The defender struck both goals for the weekend's 2-1 win at Huesca.
Zidane said, "He arrived when he was 18 and from the start he showed what he can do.
"He's won a lot and shown his ability to be a leader, help others and show what he's capable of doing out on the pitch. He deserves the two goals in the last game and the character to give us the win."
Zidane also discussed Karim Benzema as a free-kick taker.
He added: "I was also a free-kick taker, but there were a lot of players. Karim has the quality to take free-kicks, like a lot of players in the squad. That's something between them and they talk about it before games, but in the end it's a matter of confidence. If he feels confident, he'll take it."