The World Boxing Association has ordered a re-match between Briton Amir Khan and American Lamont Peterson.
Khan's US promoters Golden Boy Promotions say the WBA had ordered the rematch within 180 days after examining their appeal.
Peterson earned a surprise victory in Washington last month, taking Khan's WBA super-lightweight and IBF light-welterweight belts on a split decision.
Khan's team questioned the performance of referee Joseph Cooper who crucially deducted points from the Briton in the seventh and 12th rounds, one for pushing and one for hitting his opponent on the break.
The Brit's camp have also suggested a mystery man had interfered with the judges' scorecards.