Join Tanya Aldred for updates as Yannik Sinner looks to complete a sweep of his group by beating Daniil Medvedev.   20:07 First set: Sinner* 3-3 Medvedev (*denotes next server) Medvedev swatting those huge ground strokes from the base line.

U.S. Open finalist Taylor Fritz frustrated Daniil Medvedev to the point that that the Russian broke his racket and was docked a point in a 6-4, 6-3 victory for the American in the opening match of the ATP Finals.

Top-ranked Jannik Sinner has become the first player to advance to the semifinals at the ATP Finals in Turin. Sinner was assured of a spot in the last four after U.S. Open finalist Taylor Fritz beat Alex de Minaur 5-7,