Everything that Jannik Sinner means to the summit of men's tennis could be temporarily wiped away in just a few months.

Jannik Sinner has become the center of much debate following his brilliant run at the Australian Open. The Italian tennis phenom, fresh off his title defense in Melbourne, grabbed attention not only for his on-court success but also for rejecting an invitation to visit the Quirinale presented by Italian President Sergio Mattarella.

Australian tennis player-turned-commentator Rennae Stubbs has made the shock declaration she thinks Jannik Sinner is "guaranteed" to cop a ban when he fronts the Court of Arbitration for Sport (CAS) in April.