Write off the American wunderkind at your own peril.

The Italian hopes to become the third player to win the ATP Finals on home soil since 2000

Taylor Fritz fired nine aces and did not drop serve defeating a cranky Daniil Medvedev 6-4, 6-3 in his ATP Finals round-robin opener.

Coco Gauff broke when Zheng Qinwen served for the title sparking a 3-6, 6-4, 7-6(2) comeback win to capture the WTA Finals title and a record $4.8 million champion's check.

Shapovalov ended a long title drought with his 6-4 6-4 win in Belgrade .

Benjamin Bonzi came from qualifying to win his maiden ATP title on home soil in Metz.