David Luiz admits he and Chelsea boss Frank Lampard had "different plans" about the upcoming season.
Luiz left Chelsea for Arsenal on deadline day in a move that shocked the Premier League.
"Everyone knows I was so happy in Chelsea and won many trophies there and had a real honest conversation with Lamps, and Lamps had different ideas for his plans for the year," Luiz said.
"So the best way for me to respect the club where I can was to move on and try to do a new challenge - and give him (Lampard) the opportunity to do his job.
"I am so happy here [at Arsenal] as since the first day I felt welcome. This is a big club and I want to be here and see it shine on the pitch and outside."
