Anne Viensouk Keothavong (born 16 September 1983) is a British professional tennis player. She is a former long-standing British number 1, however she is the current British number 2, behind Elena Baltacha and is ranked 81st in the world (as of 28 May 2012). So far in her career she has won a total of 19 International Tennis Federation singles titles, 8 ITF doubles titles and reached a career-high singles ranking of world No. 48 (achieved 23 February 2009). She has also reached the semifinals of four International tournaments on the main tour and the semifinals of one Premier tournament.

In terms of Grand Slam success, Keothavong's best result so far came at the 2008 US Open, where she reached the third round. She beat Alexa Glatch in the first round and followed this up with a victory over the No. 25 seed, Francesca Schiavone, a woman ranked 60 places above her. She faced world No. 6, Elena Dementieva, in round three and was defeated. Anne has also managed to reach the second round of Wimbledon on three occasions: in 2004, 2008 and 2011. In 2004 she beat Nicole Pratt in the first round and lost to Maria Sharapova, the No. 13 seed, in straight sets in round two. The 2008 tournament saw her beat Vania King in round one but she went on to experience a second round loss to Venus Williams. In 2011 Wimbledon, she had a first round win over fellow Brit Naomi Broady, in straight sets. The score was 6–2 6–4 for Keothavong. She went on to face lefty Czech, and eventual champion, Petra Kvitova in the second round. She lost in straight sets, 2–6 1–6.

Serena Jameka Williams (born September 26, 1981) is an American professional tennis player and a former world no. 1. The Women's Tennis Association has ranked her world no. 1 in singles on five separate occasions. She became the world no. 1 for the first time on July 8, 2002 and regained this ranking for the fifth time on November 2, 2009. She is the only female player to have won over $35 million in prize money.

Her 27 Grand Slam titles places her ninth on the all-time list: 13 in singles, 12 in women's doubles, and 2 in mixed doubles. She is the most recent player, male or female, to have held all four Grand Slam singles titles simultaneously and only the fifth woman in history to do so. She was also the first woman, along with sister Venus Williams, to hold all four Grand Slam doubles titles simultaneously since Martina Hingis did so in 1998. Her 13 Grand Slam singles titles is sixth on the all-time list. Williams ranks fourth in Grand Slam women's singles titles won during the open era, behind Steffi Graf (22 titles) and Chris Evert and Martina Navratilova (18 titles each). She has won more Major titles in singles, doubles, and mixed doubles than any other active player, male or female.