The banners and signs — one of which declared, “Sinner for president.” Late in the second set of his victory over Taylor Fritz at the ATP Finals on Tuesday, Jannik Sinner used all the adulation in his home country to his advantage.

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.

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.

Jannik Sinner hit the accelerator at the end of each set as he cruised past Taylor Fritz 6-4, 6-4 on Tuesday to close in on a semi-final spot at the ATP Finals in Turin

Carlos Alcaraz looked little like the player who won two Grand Slams this year in a 6-1, 7-5 loss to Casper Ruud at the ATP Finals

Norway's Casper Ruud eased to a straight-sets victory over Carlos Alcaraz on Monday as the Spanish star's bid for a maiden ATP Finals title got off to a poor start.