Ben Shelton said uncharacteristic errors at crucial moments had proved costly during his Australian Open semi-final loss against defending champion Jannik Sinner on Friday, after the American squandered the chance to go a set up early in the match.

Jannik Sinner has overcome some third-set cramping to beat Ben Shelton 7-6 (2), 6-2, 6-2 to return to the Australian Open final as he pursues a third Grand Slam title.

Ben Shelton has reached his first Australian Open semifinal by defeating Lorenzo Sonego 6-4, 7-5, 4-6, 7-6 in an entertaining match.