Sinner opens up about his doping case

Italian ace suffered sleepless nights before winning ATP Finals trophy

Sleepless nights, constant thoughts of what went wrong — and how it could have been prevented.

Jannik Sinner opened up about his ongoing doping case after beating US Open runner-up Taylor Fritz 6-4, 6-4 on Sunday to claim the ATP Finals trophy in front of his home fans at the Inalpi Arena in Turin, Italy.

Sinner tested positive in two separate drug tests in March, and a decision to clear him of wrongdoing was appealed by the World Anti-Doping Agency in September. A final ruling is expected from the Court of Arbitration for Sport early next year.