Jannik Sinner saw off close rival Carlos Alcaraz to clinch the ATP Finals title with a 7-6 (7-4) 7-5 victory after the Spaniard struggled with a hamstring injury.

An extremely tight and competitive first set saw no single break point conceded until Alcaraz forced set point, by which point the 22-year-old had already received treatment to his injured hamstring following an overstretch.

Instead, the first set entered a tiebreak, with Sinner coming out on top as Alcaraz proceeded to make a host of uncharacteristic errors.

Alcaraz returned for the second set with heavy strapping to his leg, and pinched a break in the first game as Sinner struggled with his serve.

The Spaniard looked to intentionally be keeping points short due to his injury, and the key moment of the match saw a huge piece of fortunate go Sinner's way when he sliced a service return into the air at break point following a legal double-hit - claiming the break with a drop shot with Alcaraz on the back foot.

A nervous Sinner eventually closed things out with a late second break of Alcaraz, just avoiding a second tiebreak as the latter produced a number of unforced errors.

More to follow...

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