With the annnouncement of her second pregnancy in May 2023, Serena Williams has almost certainly brought the curtain down on her glittering tennis career.
The American's tally of 23 Grand Slam singles titles is the most of any player in the Open era, one more than fellow 'GOAT' candidate Steffi Graf and one behind Margaret Court who won 13 Slams when only amateur players were allowed.
In 2003 and 2015, Williams held all four Slam titles at the same time with the feat known as the 'Serena Slam'.
Court (1970) and Graf (1988) are the only two women to win calendar Grand Slams with the German's gold in Seoul securing her a unique 'Golden Slam'.
Williams' older sister Venus, who has seven Slam singles titles to her name, continues to play on the WTA Tour. The siblings won 14 Slam doubles title together as well as three Olympic golds with Serena taking singles gold at London 2012.
While she has not officially retired, the 41-year-old told Vogue ahead of the 2022 US Open that she was "evolving away from tennis".
She was expecting her first child, daughter Olympia, while securing what turned out to be her last Slam triumph at the 2017 Australian Open where she beat Venus in the final.
After her return from childbirth, Williams reached consecutive finals at Wimbledon and the US Open but lost all four with the most recent being her 2019 US Open final defeat to Bianca Andreescu.
Read on for statistics from Serena Williams' groundbreaking career.
Serena Williams by the numbers
2 - Grand Slam mixed doubles titles, both with Max Mirnyi.
4 - Olympic gold medals (one in singles at London 2012, three in doubles with sister Venus). Venus is the only other four-time tennis Olympic gold medallist.
6 - Grand Slam singles titles won without dropping a set, tied for the record with Martina Navratilova.
7 - Australian Open women's singles titles, a record.
14 - Grand Slam women's doubles titles, all with Venus. The siblings are unbeaten in Slam doubles finals together.
21 - Number of Slam matches Williams won in 2002, without defeat, as she won the French Open, Wimbledon and the US Open after missing the Australian Open through injury.
23 - Grand Slam singles titles, the most of any player in the Open era.
33 - Grand Slam singles finals, one behind Chris Evert's Open era record and level with Novak Djokovic.
47 - Career hardcourt titles, a women's record.
73 - Career WTA singles titles (including Slams).
86.8 per cent - Singles win-loss percentage placing her fourth in the women's all-time list behind Margaret Court (90.7), Steffi Graf (89.7) and Evert (89.0).
186 - Consecutive weeks spent at number one in the women's world rankings, joint-top with Graf.
319 - Total number of weeks Williams spent as women's number one behind only Graf (377) and Navratilova (332).
367 - Career wins, a record among women (two behind Roger Federer).
423 - Career matches, a record among women (six behind Federer).
858-156 - Serena Williams' career win-loss record in singles
$94,816,730 - Total career prize money