Racing PositionsBesiktas sign Adriano from Barcelona1YESPN staffBarca's Adriano probed for alleged tax fraud1YAssociated PressAdriano back in Barcelona contention1YESPN staffAdriano decides to prolong Barca contract1YAdriano would bet Messi plays against Real1YESPN staffAdriano considering Barcelona exit - agent1YPA SportBarca's Adriano heart problem detected1Y