Chelsea FC have confirmed this evening that we have signed David Luiz from Benfica for an undisclosed fee. In what has been a day Chelsea fans will never forget in a long long time, the club confirmed the deal on the official website. Luiz spoke to Chelseafc.com and said:'I am delighted to be joining a big English club, and I know very well the quality that Chelsea has. It is a major challenge for me but I am determined and confident in my ability to adapt to this excellent league, and I look forward to meeting my new-team mates.'(Source:Chelseafc.com)Another fantastic signing for Chelsea!. What do you the fans think he can bring to the club?...