The men's world No. 1 missed several tournaments, but no Grand Slams. Here's what to know about the doping proceedings against him.

Jannik Sinner’s reappearance at the Italian Open guarantees attention, following his three-month suspension for failing two “in-competition” drug tests, during and eight days after Indian Wells last year,

Sinner also revealed an unexpected component of his ban, which he described as the "toughest part" of his suspension. The world No. 1 was not allowed to attend any sanctioned sporting arenas, which meant he couldn't watch professional sport in the flesh. As an avid football fan, this proved to be a challenge for Sinner.