The Colombian played a major role in Real's fight-back against Sporting CP in the Champions League.
"Right now he's not a starter but he can become one, regardless of what he did in the 15 minutes," said Zidane.
"Today he made a difference, but I assess him on the work he does day in, day out. I'm pleased with his display. We know the sort of player that he is and he'll get given playing time."
He added: "Real Madrid's history is obvious to everyone. The fans that come to the ground like this sort of thing. Today it was tough but the fans enjoyed themselves. This is Real Madrid, we know that, at any given time, we can make the difference."