With all this talk of Chelsea potentially wrapping up a deal for Serbian international Nemanja Matic, I thought I'd take a look at the player Chelsea captured in the deal that saw Matic leave Stamford Bridge in January 2011.
Transfer rumours have been circulating that Chelsea could sell David Luiz, with Barcelona reported as potential suitors.
The Brazilian defender's form has been inconsistent under Jose Mourinho but his recent performances in midfield, a position which Rafa Benitez first played him in, have been impressive.
Against Hull, Luiz completed 78% of his passes and made four interceptions. The home side only had two shots on target and this was, in part, down to Luiz's impressive patrolling of the back four.
His erratic nature does not befit that of a defender. He looks unpredictable at the back and his talents on the ball are stifled as a result of the discipline required to play there. Additionally, Gary Cahill and John Terry have formed a solid partnership, conceding just one goal in six games.
I'm not denying that the holding role requires discipline but the ability to pick the ball up, play a pass and read the game is so much more important. These are qualities which the Brazilian possesses in abundance.
He contributed five assists and seven goals in all competitions last year, from a mainly central defensive position. The untapped potential is huge.
Chelsea are reportedly in talks to bring Nemanja Matic back to the Bridge and I don't see too much wrong with that. Frank Lampard is arguably in his last season for the Blues and John Obi Mikel, for me, does not offer enough to support Ramires in the middle. Matic would be an excellent addition to a superb squad.
However, I actually feel that Luiz is the more naturally talented player. His distribution is wonderful and he is confident on the ball.
It really would be a travesty if Chelsea let the 26-year-old leave. Any team would be strengthened by the addition of David Luiz, even the star studded midfield of Barcelona.
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