Novak Djokovic called for standardised protocols for doping cases after an independent tribunal ruled that Jannik Sinner would bear no fault and negligence for two positive anti-doping tests for the banned substance clostebol. Djokovic questioned whether Sinner had preferential treatment because he was allowed to play for months during the investigation while other players have faced suspension for similar cases. Djokovic said: ‘I can understand the sentiments of a lot of players that are questioning whether they’re treated the same’