Jannik Sinner will face his trickiest test yet at the Australian Open when the defending champion battles Dane Holger Rune in the fourth round on Monday, while five-times Grand Slam winner Iga Swiatek will be the heavy favourite against lucky loser Eva Lys.

Emma Raducanu suffered the joint-heaviest defeat of her career as second seed Iga Swiatek demonstrated her superiority in a one-sided Australian Open

Here are three questions after Iga Swiatek needed just an hour to advance to the third round of the. She'll face a familiar foe next.