Although Madrid head into Tuesday's Champions League encounter with Borussia Monchengladbach on the back of a 3-1 Clasico win over Barcelona, prior back-to-back defeats to promoted Cadiz and depleted Shakhtar Donetsk raised questions.
Both shock losses came at home, with the 3-2 reverse to Shakhtar – in which they found themselves 3-0 down at half-time – seeing Los Blancos playing catch-up right away in Champions League Group B.
The Clasico victory at Camp Nou on Saturday prevented the pressure from increasing, though another poor result in Europe will surely have Zidane on the back foot again.
But Kroos is adamant such defeats are not on the coach.
"For our part, there have never been doubts with Zidane," he told reporters. "We lose and win together.
"It is easy if something is not going well to say that there are doubts, but the result of the Clasico showed that it is not like that.
"If you play for Madrid you have to accept that if you lose matches there is criticism. The important thing is how you react and we did very well, but it is only one victory and you have to continue like this."