Casemiro says to be successful with Real Madrid, players must learn the culture.
The midfielder admits knowing the club's history has helped him over the years.
Casemiro told Panenka: "Juanito's story. Minute '7', when the fans sing and remember that we have to fight until the end.
"People say that Madrid is the best club in the world because only the best play here. But if I've learned anything here, it's that the fans highly value sacrifice, hard work, giving everything you have, not giving up, regardless of the result.
"The best in history have passed through here: Cristiano, Ramos, Ronaldo, Zidane, Gento, who just left us, Di Stéfano... This club lives on its legends, and players like Juanito, who fought, who worked, that was all character in the field, it was a mark I value it very much."