World No 1 Aryna Sabalenka said it would be "cool" to see Serena Williams return to tennis after the American great refused to rule it out when asked, and instead replied, "I don't know. I'm just going to see what happens."
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The 23-time Grand Slam singles champion, a 44-year-old mother-of-two, has not competed since a third-round loss at the 2022 US Open.
But she re-entered the tennis anti-doping testing pool in December, setting off the rumour mill, only to deny that she was making a comeback.
She was questioned about the prospect again on television show "Today" on Wednesday and while not confirming any plans, would also not rule it out.
"I'm just having fun and enjoying my life right now," Williams said.
Pressed on whether that was a yes or no, she replied, "That's not a yes or a no. I don't know, I'm just going to see what happens."
Asked why she had re-entered the drug-testing programme, Williams said: "Did I re-enter? I didn't know if I was out. Listen, I can't discuss this."
Williams' sister Venus played at the ongoing Australian Open in Melbourne aged 45 after being handed a wildcard and was knocked out in the first round.
Venus also competed at tournaments in Auckland and Hobart after returning to tennis in July after almost two years away.
Asked about the prospect of Serena returning, Australian Open finalist Sabalenka said she had not spoken to anyone about it.
"I heard that she's enjoying her life, and whatever makes her happy, I'm happy for her," she said.
The Belarusian, who is into a fourth straight Melbourne final, added, "If she wants to come back, that's her decision. It's going to be fun to see her back on tour.
"She's got the personality, and she's a fun one. It will be cool."
Ukraine's Elina Svitolina, beaten by Sabalenka in their Melbourne semifinal, said it was the first she had heard about it, but said it would be "amazing for the sport".
"She's such a great champion and achieved so much, did so much for our sport and been an inspiration for women around the world," she added.
'NO DOUBT'
During the Australian Open, former world No 1 Jim Courier, now a commentator, noted how onerous it was for athletes to be on the anti-doping testing pool.
Once they are, they need to provide information about where and when they are available to give samples.
They need to complete testing for six months before being allowed to return to competition.
"No person that doesn't have intentions to play professional tennis is going to put themselves in that list, especially someone who has as much experience doing it as Serena Williams," Courier said.
"Serena denied (in December) she's coming back, but I think unless she gets injured there is no doubt she's going to play somewhere at some point.
"Whether that's the mixed doubles at the US Open, whether that's doubles with her sister somewhere, whether it's singles, only she knows.
"But there's no other way to interpret that."
The Williams sisters won 14 Grand Slam doubles titles as a pair and three Olympic gold medals.