Nick Kyrgios’ return to the Australian Open is over after he and partner Thanasi Kokkinakis stopped playing while trailing in the second set of their first-round doubles match.

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.

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

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

If this was the last Australian Open singles match of Nick Kyrgios' career — and, to be sure, it's hard to know with him, no matter what came out at his news conference — the big-hitting, big-talking tennis player went out rather quietly Monday night.

Nick Kyrgios has dropped a bomb surrounding his future at the Australian Open and it is not what fans want to hear. Nick Kyrgios says he can’t see himself playing men’s singles again at the Australian Open. The 29-year-old was knocked out in the first round of the tournament on Monday by Brit Jacob Fearnley (7-6, 6-3, 7-6).

After months of interminable hype and speculation, Nick Kyrgios finally made his grand return to the Australian Open. Despite having a low bar set for him after missing almost two full years, Kyrgios still laid an egg in front of his home crowd in Melbourne.

Nick Kyrgios admits that he has "probably" played singles at the Australian Open for the last time after his return to the Grand Slam stage ended with defeat in the opening round in Melbourne.

If this was the last Australian Open singles match of Nick Kyrgios’ career — and, to be sure, it’s hard to know with him, no matter what came out at his news conference — the big-hitting, big-talking tennis player went out rather quietly Monday night.