One talented 19-year-old was crowned for the first time in his career as an ATP champion, while Rafael Nadal and others geared up for the prestigious year-end event in London.
These are the Top 5 photos from Saturday.
1
Jannik Sinner
Two competitors were vying for their first ATP tour-level trophy, and in the end, 19-year-old Sinner came out on top with a 6-4, 3-6, 7-6 (3) victory over Vasek Pospisil. The Italian became the youngest man to claim an ATP title since Kei Nishikori in 2008. He will also crack the Top 40 for the first time in his young career.