Jannik Sinner said he “didn’t feel at ease” during the Australian Open in January and considered taking a break from tennis after he was sanctioned for two anti-doping violations.

Jannik Sinner has revealed he considered quitting tennis amid the fallout from his doping case. The world number one is preparing to return to the sport after agreeing a three-month ban with the World Anti-Doping Agency over the positive tests he returned last March for a banned steroid.