Jannik Sinner’s deal with the World Anti-Doping Agency to accept a three-month ban for positive doping tests has been criticized by Australian player Nick Kyrgios, with the Professional Tennis Players Association citing a “lack of transparency" in the system.

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.

With Roger Federer and Rafael Nadal out of the picture and the clock ticking on Novak Djokovic, we are currently in the midst of a new era of tennis. At the forefront of that new era are two young superstars – Carlos Alcaraz and Jannik Sinner.