Jannik Sinner’s long doping saga came to an end on Saturday after he agreed to a three-month ban from tennis, the World No. 1 admitting “partial responsibility” for team mistakes which led to him twice testing positive for traces of clostebol in March last year.

Clostebol is classified as an anabolic steroid; it’s designed to mimic testosterone, promoting muscle growth, endurance, and faster recovery — qualities that can unfairly boost athletic performance. Hence, it is banned by WADA and IOC.