Is he the best left-back in the Premier League? Without a doubt. The amount of quality he has in his game is incredible and his danger from set-pieces doesn't need to be explained in detail.
He's scored more goals then any other left-back in the Premier League in 2013, with six goals, but he also has great vision to intercept dangerous through balls. It would be no surprise if he was England's first choice left-back in Brazil.