TURIN (Reuters) -Italian world number one Jannik Sinner eased past Daniil Medvedev 6-3 6-4 in their final group match on Thursday, leaving Taylor Fritz to seal a place in the semi-finals of the season-ending ATP Finals after the American defeated Alex de Minaur 5-7 6-4 6-3.

Taylor Fritz, the U.S. Open finalist who lost to Sinner in New York, was also drawn in the Italian’s group alongside Australian Alex De Minaur, making his ATP Tour Finals debut; Casper Ruud and Andrey Rublev, who qualified as world No. 9 after Novak Djokovic withdrew, rounded out the second group.

TURIN, Italy (AP) — Top-ranked Jannik Sinner became the first player to advance to the semifinals at the ATP Finals on Thursday. Sinner was assured of a spot in the last four after U.S. Open finalist Taylor Fritz beat Alex de Minaur 5-7, 6-4, 6-3 in their group.

Things couldn’t get much better for Jannik Sinner at the ATP Finals so far — despite an ongoing doping case that likely won't be decided until early next year. Sinner and U.S. Open finalist Taylor Fritz advanced to the semifinals on Thursday at the season-ending tournament for the year's top eight players.

Join Tanya Aldred for updates as Yannik Sinner looks to complete a sweep of his group by beating Daniil Medvedev

Jannik Sinner capped a perfect group stage at the ATP Finals with a 6-3, 6-4 win over Daniil Medvedev on Thursday which eliminated his Russian rival.