Chelsea defender David Luiz has revealed manager Maurizio Sarri has challenged the players about his methods.

And Luiz says he and his team-mates still believe in Sarri's philosophy.

He said: "We have had many meetings already asking if someone doesn't believe.

"They can say. Nobody said anything. It's because everyone believes [in it]."

Luiz added: "There is a big difference when you have already understood everything, it is much easier to play football. I think we are in the right way to still improve to become a fantastic team."