Ukrainian boxer Wladimir Klitschko (R) and British heavyweight world champion Tyson Fury.

World heavyweight champion Tyson Fury announced he was retiring from boxing in a profanity-laced tweet on Monday. "Boxing is the saddest thing I ever took part in, all a pile of shit, I'm the greatest, & I'm also retired... " Fury tweeted. Reports by US broadcaster ESPN last week claimed Fury had tested positive for cocaine and the British fighter had recently cancelled an October bout with Wladimir Klitschko to defend his WBA and WBO heavyweight belts.

Source : AFP