Jannik Sinner is through to the Australian Open quarterfinals after a drama-filled fourth-round win over Holger Rune. World No. 1 Sinner won in four sets, 6-3. 3-6, 6-3, 6-2, but this did not tell the story of a contest defined by illness.

The World No. 1, despite feeling unwell in sweltering conditions, kept up his title defense with a four-set triumph.

MELBOURNE – If someone is required to dismantle a nation’s hopes, then Jannik Sinner is a fine choice. He will do it without fuss. He will not beat his chest, prance in victory or even grunt. He will simply not miss. He will bring cold calculation, a Gatling-gun forehand, a face that tells you nothing and puncture your challenge.