Join Tanya Aldred for updates as Yannik Sinner looks to complete a sweep of his group by beating Daniil Medvedev.   19:01 There’s about half an hour till Sinner v Medvedev – the semi-final decider.

Taylor Fritz benefited from a questionable serving decision by Daniil Medvedev and frustrated his opponent so much 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.

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.