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.

After surgery and close to 16 months of around-the-clock rehabilitation, things began looking up for Nick Kyrgios. And yet here he is, dealing with pain once more.

The 29-year-old’s Australian Open return was short-lived — and he warned it could be his last singles match in his homeland.