Costa Rican goalkeeper Keylor Navas was recalled to the starting line-up for the first game of Zidane's second spell in charge of Real, a 2-0 victory over Celta Vigo, at the expense of former Chelsea keeper Courtois.
But Courtois is not permanently dropped insists Zidane, who told Marca: "No one can take away what all these players have achieved in the past. I have a squad of 25 players and I am going to have to count on all of them, on Courtois, Keylor, Isco...
"Those who played today were very good but I am going to use everyone. There are of course those who are sometimes going to be left out, who are not going to play."
Expanding on his choice to bench Belgian keeper Courtois, who arrived expensively from Chelsea last summer, Zidane added: "It's not a final decision, there are 10 games left.
"Thibaut is going to play again and the third goalkeeper is Luca (Zidane). That's three good goalkeepers but Madrid should have three or four great goalkeepers.
"You cannot contest four, five or six competitions with just one great goalkeeper."