Researching Serena Williams

Williams is widely regarded to be one of the greatest women tennis players of all time. She holds the most major titles in singles, doubles, and mixed doubles combined among active players, with 39: 23 in singles, 14 in women's doubles, and two in mixed doubles. She is joint-third on the all-time list and second in the Open Era for total major titles accumulated. She is the most recent woman to have held all four major singles titles simultaneously (2002–03 and 2014–15) and the third player to achieve this twice, after Rod Laver and Graf. She is also the most recent women player to have won the Surface Slam (major titles on hard, clay and grass in the same calendar year), doing so in 2015. She is also, together with her older sister Venus, the most recent player to have held all four Grand Slam women's doubles titles simultaneously (2009–10).

Williams has won a record 13 Grand Slam singles titles on hard court. Williams holds the Open Era record for most women's singles titles at the Australian Open (7) and shares the Open Era record for most titles won at the US Open with Chris Evert (6). She also holds the records for the most women's singles matches won at majors with 365 matches and most singles majors won since turning 30 years old (10). She is the only tennis player, male or female, to have won three of the four Grand Slams at least 6 times. Williams is also a five-time winner of the WTA Tour Championships in the singles division.

Williams has won 14 Grand Slam doubles titles, all with her sister Venus, and the pair are unbeaten in Grand Slam doubles finals. As a team, she and Venus have the third most women's doubles Grand Slam titles, behind the 18 titles of Natasha Zvereva (14 with Gigi Fernández) and the record 20 titles won by Martina Navratilova and Pam Shriver. She and Venus are the only tennis players in history with four Olympic gold medals, as well as the only ones to win Olympic gold in the same event on three occasions. She and Venus are the only Open Era women tennis players to win Olympic Gold in both the singles and doubles categories. At the 2012 Summer Olympics, Williams became only the third player to win Olympic gold medals in both singles and doubles at one Olympic Games, after Helen Wills Moody at the 1924 Summer Olympics and Venus at the 2000 Sydney Olympics. Williams is the only player, male or female, to accomplish a Career Golden Slam in both singles and doubles. The arrival of the Williams sisters has been credited with ushering in a new era of power and athleticism on the women's professional tennis tour.

Earning almost $29million in prize money and endorsements, Williams was the world's highest-paid woman athlete in 2016. She repeated this feat in 2017 when she was the only woman on Forbes list of the 100 highest-paid athletes with $27million in prize money and endorsements. She has won the 'Laureus Sportswoman of the Year' award four times (2003, 2010, 2016, 2018), and in December 2015, she was named Sportsperson of the Year by Sports Illustrated magazine. In 2021, she was ranked 28th on Forbes World's Highest-Paid Athletes list. In terms of career prize money, she stands as the highest-earning woman athlete of all time.