Shanghai 's the world swimming championships champion Court of Arbitration of Sport escapes drugs ban . Special panel of Court of Arbitration of Sport gives Court of Arbitration of Sport a warning . Cielo , who won the 50m freestyle at the 2008 Beijing Games , was cleared by a special tribunal of the Court of Arbitration of Sport sitting in Shanghai where the worlds are being held . Cielo can defend his 50 and 100m freestyle titles at Shanghai worlds . Cielo and 50 and other teammates tested positive for banned diuretic .
Shanghai 's the world swimming championships champion Court of Arbitration of Sport escapes drugs ban . Special panel of Court of Arbitration of Sport gives Court of Arbitration of Sport a warning . Cielo can defend his 50 and 100m freestyle titles at Shanghai worlds . Cielo and 50 and other teammates tested positive for banned diuretic .