The 2015-16 season has been Sergi Roberto's breakthrough for Barcelona.
Of course, he really broke through in 2013-14—a campaign in which he played 27 times. But it is only this term in which he has found his feet at the club and become a valuable player for manager Luis Enrique.
For far too long after he made his debut, in 2010, Roberto was a player of little consequence.
He was first seen as a hot prospect and then as someone who was never going to make good on their early potential.
