MELBOURNE - Defending champion Jannik Sinner was not at his fluent best but still had too much firepower for unseeded American Marcos Giron as he sealed a 6-3 6-4 6-2 win and reached the fourth round of the Australian Open on Saturday.

World number one Jannik Sinner has now claimed 64 match wins at the majors, which moves him clear of Andreas Seppi (63) for the outright second most of any Italian in the Open Era, behind only Fabio F

The 23-year-old Italian’s next opponent in Australia will be No. 13 Holger Rune, who beat Miomir Kecmanovic 6-7 (5), 6-3, 4-6, 6-4, 6-4.