By the Associated Press

Down to what sure felt like her last chance, Serena Williams came through with a cross-court forehand winner to close a 24-stroke point, then raised her arms, held that celebratory pose and looked over toward her guest box.

Finally, on her sixth try, after 1½ hours of action, she had managed to convert a break point against 27th-seeded Wang Qiang in the Australian Open’s third round.

Right then, it appeared that the comeback was on, the bid for a 24th Grand Slam singles title could continue. It turned out that Williams only was delaying a surprising defeat.

So tough at the toughest moments for so many years, Williams just could not quite do enough to put aside some shaky serving and all manner of other miscues, instead making her earliest exit at Melbourne Park in 14 years, a 6-4, 6-7 (2), 7-5 loss today to Wang.

“I was optimistic that I would be able to win. I thought, ‘OK, now finish this off.’ I honestly didn’t think I was going to lose that match,” Williams said about her mindset after forcing a third set.

She began by crediting Wang but eventually shifted to criticizing herself for not playing well enough to win.

“I didn’t return like Serena. Honestly, if we were just honest with ourselves, I lost that match,” Williams said. “I can’t play like that. I literally can’t do that again. It’s unprofessional. It’s not cool.”

Williams was broken in the final game after more than 2 1/2 hours, fittingly ending things with a backhand into the net. That was her 27th unforced error on the backhand side, part of a total of 56 miscues. Wang made only 20.

“I’m better than that,” Williams said.

As Williams trudged through the long walkway that leads to the locker room, Wang was interviewed in Rod Laver Arena, telling the crowd: “I think my team always believed I can do it.”

Since grabbing major championship No. 23 at the 2017 Australian Open, while she was pregnant, Williams hasn’t added to her total.

She appeared in four major finals over the past two seasons, losing each one.

And she bowed out much, much sooner this time, animated as can be, often displaying what she later called “the signature ‘Serena frustration’ look.”

Williams owns seven trophies from the Australian Open and hadn’t lost as early as the third round since all the way back in 2006.

Here is just one measure of how unexpected this result was: The only other time these two women faced each other came at the U.S. Open last September — the only Slam quarterfinal appearance of Wang’s career — and Williams needed all of 44 minutes to dominate her way to a 6-1, 6-0 victory. The total points were 50 to 15.