Despite testing positive for a banned substance, Tennis world number one Jannik Sinner has only been banned for three months. Novak Djokovic spoke of "favoritism," while Alexander Zverev called the case "odd.

WADA's differing doping bans for tennis player Jannik Sinner and skater Laura Barquero have sparked controversy. While both involved Clostebol, Sinner received a three-month ban after proving his accidental exposure,