Nemanja Matic
One of a number of talented young players with clear potential never to really be given a chance at Chelsea, midfielder Nemanja Matic spend a couple of years at Stamford Bridge after signing from Kosice, but most of that was on loan in the Eredivisie with Vitesse Arnhem. When he was sold to Benfica on a permanent deal not many eyebrows were raised, but Matic flourished with regular football and the Blues had to pay upwards of £20 million to bring the Serbian international back in January, since when he has proven himself to be one of the finest destructive midfielders around.