Novak Djokovic said a majority of players believe favouritism is at play in the tennis anti-doping system and called for it to be overhauled in the wake of cases involving Jannik Sinner and Iga Swiatek.

Novak Djokovic says the majority of tennis players have lost faith in tennis’ doping agencies after Jannik Sinner accepted a three-month ban, and that there are widespread feelings of “favoritism” for the sport’s biggest stars.