Join Katy Murrells for updates as the world No 1 Jannik Sinner takes on Taylor Fritz in Turin.   21:33 Sinner – so understated when he speaks, in contrast to his fierce hitting – says on court: It was very tough match.

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.