Racing PositionsSrna tests positive for banned substance3YPA SportShakhtar's Srna rules out Barcelona move4YESPN staffKovacic will be better than Modric - Srna4YDermot CorriganLuis Enrique: 'Barca open to strengthening'4YSam MarsdenShakhtar confirm Barca interest in Srna4YSam MarsdenSrna would add needed experience and depth for Barca at right back4YSam Marsden#FC100: Top 10 right-backs defined by Philipp Lahm's brilliance4YNick AmesCroatia captain Srna rejoins the squad5YAssociated PressSrna returns to Croatia for father's funeral5YESPN staff