Conte said: "I think David Luiz is a centre-back, he's played a lot of games in that position.
"I know sometimes he's played as a central midfielder but in my mind the idea is to utilise him in the right position which, for me, is centre-back. He's played with Chelsea previously and he will bring a good personality."
http://talksport.com/football/chelsea-fc-news-antonio-conte-not-planning-use-david-luiz-midfield-160907209123#ubwVqQS8dmsfFrvY.99