The Spain midfielder bagged both goals as the Galacticos climbed to fifth in the La Liga standings, having previously endured a rocky start to the campaign.
And while Zidane claims to have always been a fan of the forward, the coach believes he is now starting to produce his very best.
"He [Isco] has more confidence. He knows now that he is important but he has always been,” Zidane told AS.
"He plays the way he plays on the street - he has no worries and I like it. When things don't work out, he has patience.
"I hope we can see an even better Isco."
He added: "He [Isco] is not tired but he has missed a lot of games.
"He is very disappointed because he hasn't scored yet but this is football. I hope in the next game it changes for him but that pass to Isco was phenomenal."