The Canadian reflected on a “tough couple of years” after reaching this year's U.S. Open semifinals. Now he is climbing back.

Overall, Sinner is the third player ever—at any age—to reach the final at all four Grand Slams and the ATP Finals in a single season, after Roger Federer and Novak Djokovic, who both did it twice.

His 6-4, 6-1 win over Lorenzo Musetti on Thursday was his milestone 70th win of the year. He's now an incredible 70-8 this season. And no other man will even come close to that win tally.