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 (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.

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,

World number one Jannik Sinner continued his perfect start at the ATP Finals with a dominant win over Russian Daniil Medvedev. Playing on home soil in Turin, Sinner won 6-3 6-4 to top the Ilie Nastase group with three wins from three.

The ATP Finals’ organizers have already published the order of play for Day 6: Alcaraz and Zverev will face each other in the day session, while Ruud and Rublev will clash in the night session.

Still plenty to play for in group Ilie Nastase, although the scenarios where Jannik Sinner doesn’t make the semifinals or Alex de Minaur does are mostly theoretical.

Jannik Sinner's form showed no sign of waning after he turned on the style in front of his home fans to trounce Taylor Fritz 6-4, 6-4 at the ATP Finals on Tuesday.