Alex de Minaur, the world No. 8, and Nick Kyrgios, who is back after a two-year battle with knee and wrist injuries, are the headliners for their country at Melbourne Park. Kyrgios emceed the night session on John Cain Arena Monday, before De Minaur headlines Rod Laver Arena, the pantheon of Australian tennis Tuesday night.

Nick Kyrgios hinted on Monday that his straight-sets loss in the first round of the Australian Open may be his final singles match in his home country's Grand Slam event.

Nick Kyrgios has made several comments in recent months that suggest he may be closing in on retiring from tennis - the latest coming after his Australian Open defeat