Chelsea could not believe that Arsenal were very eager to sign David Luiz in the last transfer window, according to Tony Cascarino. Arsenal hoped to make good use of his experience in their defence, but he has so far failed at the Emirates Stadium. Speaking on his move recently, Tony said Chelsea was shocked that the London club wanted their poorest defender and jumped at the opportunity to get rid of him to a direct rival for a cheap price. His words, "David Luiz. "When Arsenal bought the Brazil defender in the summer for £8m I know that Chelsea’s reaction was: ‘Wow, they’ve taken our poorest defender’. "You have that familiar image of him chasing after a forward who has got behind him: opponents always know that the 32-year-old will give them space by wandering out of position. "He is a fine footballer who sprays the ball around well but for a player with so much experience his defending is not good enough." Luiz will feature vs Chelsea on Sunday.