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

Reigning Australian Open champion Jannik Sinner has been entangled in a doping case that could lead to a two-year ban from tennis. The Italian, who won his second straight Australian Open title by beating Alexander Zverev 6-3, 7-6 (4), 6-3 in the final on Sunday, now stands atop the world rankings.

It's hard to watch the way Jannik Sinner plays tennis and not think of Novak Djokovic. Of all the praise bestowed on Sinner after he won his second consecutive Australian Open championship, and third Grand Slam title overall,