She has been an inspiration for many players over the years.
Serena is one of the oldest players plying their trades in women's tennis at the moment as she is still vying for a record-equaling 24th Grand Slam.
On her birthday, we look at five of her unbreakable records.
Serena has the most Slams in Open era
The veteran Serena is just one short of equaling Margaret Court's record of 24 Grand Slams. Serena boasts of the record in the Open Era, winning 23 of them. Among the current players, her elder sister Venus Williams is next with only seven titles.
Serena has an amazing win record at Grand Slams
Serena has won more than 60-plus singles matches in all of the four Grand Slams.
At the Australian Open, she has a 85-11 record.
She has a 65-13 win/loss record at Roland Garros.
At Wimbledon, which is her favorite surface, Serena has a record of 98-12.
At the US Open, Serena has a tally of 101-13.
No other player is close to this feat.
Only player to win Slams in three different decades