Jannik Sinner was just as surprised by which fellow players sent him messages of support at the start of his three-month doping ban as those who sent nothing. The top-ranked player is returning to tennis at the Italian Open this week after his settlement with the World Anti-Doping Agency raised questions,

World No. 1 Jannik Sinner says he’s mentally ready to return to the tennis court after his three-month anti-doping ban but is wondering how his body will hold up when he competes in the Italian Open this week.

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