TURIN, Italy -- Top-ranked Jannik Sinner became the first player to advance to the semifinals at the ATP Finals on Thursday.

Jannik Sinner showcases dominance at the ATP Finals, defeating Daniil Medvedev to top his group and secure a semi-final berth ...

Italy's Jannik Sinner returns the ball to Russia's Daniil Medvedev during their singles tennis match of the ATP World Tour ...

TURIN : Taylor Fritz moved closer to the semis of the season-ending ATP Finals after the American beat Alex de Minaur 5-7 6-4 ...