Costa has to prove himself for Spain says Del Bosque

BARCELONA (Reuters) - Chelsea striker Diego Costa may be prolific at club level, but Spain's coach Vicente del Bosque feels it is time he proves himself on the international stage as he leads the champions' attack during Euro 2016 qualifying.

Having convinced Costa to turn his back on Brazil, the country of his birth, Del Bosque has so far shown plenty of belief in the forward and gave him a chance to shine at this year’s World Cup, but he and Spain failed badly.