Jannik Sinner comes through a tough physical battle against Holger Rune to reach the Australian Open quarter-finals.
The World No. 1, despite feeling unwell in sweltering conditions, kept up his title defense with a four-set triumph.
World number one and defending champion Jannik Sinner crushed home favourite Alex De Minaur 6-3, 6-2, 6-1 at the Rod Laver ...