12. Diego Costa
Costa was a defender’s nightmare because of his tenacity and penchant for the dark arts. He starred for Chelsea in the Premier League after he left Atletico Madrid. But he went AWOL after a massive fallout with the manager, Antonio Conte. Then he demanded a transfer but the team refused to sanction it. Costa traveled home to his native Brazil and refused to play for the Londoners.
Chelsea demanded that he return and fulfill the terms of his contract but Costa rejected them. In an explosive interview with Sky Sports, he told them that Chelsea treated him like a ‘criminal.’ Costa claimed that he was on the brink of renewing his contract before the coach intervened. In the end, he left the club and returned to Madrid. It was a grim time for both parties.