Earlier in the day, Iga Swiatek cruised past Emma Navarro 6-1, 6-2 in their Women’s Singles quarter-final while Madison Keys secured a surprising 3-6, 6-3, 6-4 victory over Elina Svitolina to set up a meeting with Swiatek tomorrow.

The quarterfinals are underway at Melbourne Park, as rumours abound about Jannik Sinner's health ahead of his clash with Alex de Minaur. Follow live.

Question marks are lingering over Jannik Sinner and Alex de Minaur's Australian Open quarter final as rumours continue to swirl over the Italian's health.

In the Australian Open quarterfinals on Tuesday, Jannik Sinner faces Alex de Minaur.In his most recent match on Sunday, Sinner took down Holger Vitus Nodskov Rune in four sets, 6-3, 3-6, 6-3, 6-2,

Alex de Minaur has booked a blockbuster quarter-final with world No.1 and defending champion Jannik Sinner after reaching the last eight of Australian Open for the first time.

After telling fans on the weekend his "legs are back", Alex de Minaur proved it on his way to the Australian Open quarterfinals.

It's the biggest match of Alex de Minaur's career - an Australian Open quarter-final against reigning champion and world no.1 Jannik Sinner. De Minaur has never been to the last four in a major and he will have to overcome an 0-9 head-to-head record with the Italian champion.

Alex de Minaur busted through his Australian Open fourth-round ceiling with a brutal display against Alex Michelsen. Now, a date with world No. 1 Jannik Sinner looms.