Zidane faced questions about goalkeeper Thibaut Courtois, who was jeered by Real Madrid supporters before being replaced at half-time against Brugge by Alphonse Areola.
The club put out a statement to say that Courtois was ill during the match, to counter reports that he was replaced due to poor performance and anxiety.
Official Announcement: Courtois.#RealMadrid— Real Madrid C.F. 🇬🇧🇺🇸 (@realmadriden) October 4, 2019
Zidane offered words of support for Courtois, who kept three consecutive clean sheets prior to the Brugge game, but stopped short of confirming who would start in goal against Granada.
"He was bad, yes," Zidane said of Courtois. "He was disturbed. It can happen, but a player can play in spite of that. But at the break, he was no longer able to play.
"Whistles, whether unfair or not, are like that. He is strong mentally. We know, internally, that the fault is collective in the first period against Brugge.
"I have 25 players, I count on each one of them. Thibaut Courtois is one of them. People can talk, have their opinion, about what happened on Tuesday. But the three games before, it was Courtois in goal and we did not concede any goals.
"No one is indisputable, neither Courtois nor anyone. [Areola] is a great keeper, like Thibaut. He is very good, and that's it. We have two good goalkeepers who play and that's it."