David Luiz admits Chelsea's world class facilities make him want to improve his game.
The former Benfica defender loves working at Stamford Bridge.
"With the structure that Chelsea has, it is one of the best in the world and you enjoy learning there," said Luiz. "I will not be at the club for two hours, instead it may be five or six to evolve, improve myself.
"The Brazilians, South Americans have the best raw material, but they (English) speak it. In Europe tactically it is much more evolved.
"The physical part here in England is the big difference."
