Jannik Sinner and the whole doping system's lack of transparency are under fire from across the tennis world after the world number one' strikes a deal to accept a three-month ban from WADA.

Australian Open champion Sinner, 23, received a sanction in August but was found by the International Tennis Integrity Agency (ITIA) to bear “no fault or negligence” after twice testing positive for clostebol — a banned anabolic steroid — at the Indian Wells Masters 1000 tournament in March. He was permitted to continue playing.