Jannik Sinner won the ATP Finals against Taylor Fritz in front of a home crowd. For a man who is still under a doping cloud, Sinner is hitting the cleanest winners.

Top-ranked Jannik Sinner added another big title to his tremendous year, beating US Open runner-up Taylor Fritz 6-4, 6-4 on Sunday for the ATP Finals trophy before his home fans -- and before a final verdict is reached in his doping case.

World No. 1 Jannik Sinner ended a spectacular season in style on Sunday, winning his career-first Nitto ATP Finals in his native Italy. Sinner needed just 85 minutes to defeat Taylor Fritz 6-4, 6-4 for his 70th match win and eighth tournament victory of the season.