Sergio Ramos was the hero for Real Madrid in Thursday's win against Getafe, scoring the only goal from the penalty spot in the 79th minute at the Alfredo di Stefano Stadium.
The victory was Madrid's sixth in a row as Los Blancos extended their advantage over stuttering Barcelona with five matches remaining in LaLiga.
Zidane hailed captain Ramos, who took his LaLiga tally to nine goals in 2019-20 following his 450th league appearance for Madrid.
"Our captain is our leader on the field, but also outside," Zidane said of the Spain skipper, who took his career total to 100 goals.
"He is an unrepeatable player. He is unique and we know what he transmits to everyone else. I'm happy for him for his goal because when it comes to shooting a penalty, he has a lot of confidence.
"It's almost in the 80th minute and Dani Carvajal's effort in goal is from the whole team. We know that with patience and tranquillity we can score goals. This is what happened.
"The last 20 minutes with freshness we claimed a very important result. We have to congratulate all the players because what we are doing is not easy."
Zidane also provided an update on star centre-back Raphael Varane, who took a blow to the head and had to be replaced in the first half.
"Right now he's not right because it's a blow to the neck," Zidane added. "He has gone home and the doctor is going to see him and we will see from tomorrow [Friday].
"We are not going to risk anything. It was a strong blow and tomorrow we will see exactly what he has."