Serena Williams bid a tearful farewell to the Australian Open amid questions about whether she may have played at the tournament for the last time.
Williams gave the crowd inside the Rod Laver Arena a long wave goodbye with her hand on her heart following her 6-3 6-4 semi-final defeat by Naomi Osaka.
The gesture prompted speculation about whether the 39-year-old would ever be back competing at Melbourne Park, where she has won the title seven times.
In her post-match press conference, Williams responded: "I don't know. If I ever say farewell, I wouldn't tell anyone. So...."
Williams then became tearful during the next question, a relatively mundane enquiry about her unforced errors during the match, and said: "I don't know. I'm done," before leaving the room.
Williams had once again came up short in her 10th attempt to move level with Margaret Court's haul of 24 major titles.
Japanese third seed Osaka, the champion in 2019, overcame a nervous start in front of a limited crowd, let back in after Victoria's coronavirus lockdown was lifted.
From 2-0 down she won eight out of the next nine games before ultimately wrapping up victory in an hour and 15 minutes.
Osaka said on court: "I was really nervous and scared in the beginning but I eased my way into it.
"It was about having fun and it was the first day having a crowd for a while. It's an honour to play her and I didn't want to go out really bad so I just tried my best.
"I was a little kid watching her play so coming up against her on the court for me is a dream."
Jennifer Brady ensured there would be an American in the Australian Open final after Williams' exit by downing Karolina Muchova 6-4 3-6 6-4 in her semi-final.
On a stifling afternoon at Rod Laver Arena, former college player Brady dug herself out of a mid-match hole to reach her first Grand Slam decider and a daunting title clash with former champion Osaka.
Brady saw four match points slip through her fingers as she served it out nervously but finally celebrated the win when Muchova fired a forehand long.