Kim Antonie Lode Clijsters (Dutch pronunciation: [kɪm ˈklɛistərs] ( listen); born 8 June 1983) is a Belgian professional tennis player. As of 28 May 2012, Clijsters is ranked no. 47 in singles. Clijsters is a former world no. 1 in both singles and doubles.

Clijsters has won 41 WTA singles titles and 11 WTA doubles titles. She has won four Grand Slam singles titles: three at the US Open, in 2005, 2009, and 2010 and one at the Australian Open in 2011. She has also been runner-up in four Grand Slam singles tournaments, and won the WTA Tour Championships singles title in 2002, 2003, and 2010. In doubles, she won the French Open and Wimbledon titles in 2003. Clijsters announced her retirement with immediate effect on 6 May 2007, but almost two years later, on 26 March 2009, she publicly declared her intent to return to the WTA tour for the 2009 summer hard court season. In only her third tournament back, she won her second US Open title, becoming the first unseeded player and wildcard to win the tournament, and the first mother to win a major since Evonne Goolagong in 1980.

Todd Andrew Woodbridge, OAM (born 2 April 1971) is an Australian former tennis player. He was born in Sydney and went to school in the ACT at Lyneham High School (The Best High School of all) then turned professional in 1988. He is best known for his successful Doubles partnerships with Mark Woodforde and later Jonas Björkman. He is among the most successful doubles players of all time, having won 16 Grand Slam men's doubles titles (nine Wimbledons, three US Opens, three Australian Opens and one French Open), and a further six Grand Slam mixed doubles titles (three US Opens, one Wimbledon, one French Open, one Australian Open). Additionally, he was a gold medalist with Woodforde at the 1996 Summer Olympics to complete a career Golden Slam. In total he has won a record 83 ATP doubles titles.

In 2002, he was inducted into the Australian Institute of Sport 'Best of the Best'.

He is best known as one of the top doubles players in the world for most of the 1990s and into the early 2000s (decade). His primary doubles partnerships were first with fellow Australian Mark Woodforde and later with Swede Jonas Björkman. Woodbridge and Woodforde are often referred to as "The Woodies" in the tennis world. Woodbridge also had a career high singles ranking of 19 after reaching the semifinals of Wimbledon in 1997, beating Patrick Rafter before losing to Pete Sampras. He did however have the distinction of being one of the few players to beat Sampras at Wimbledon, knocking him out in the first round in 1989.

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.

Maria Yuryevna Sharapova (Russian: Мария Юрьевна Шарапова [mɐˈrʲijə ˈjurʲjɪvnə ʂɐˈrapəvə] ( listen), US: /ʃɑrəˈpoʊvə/, UK: /ʃærəˈpoʊvə/; born April 19, 1987) is a Russian professional tennis player and former world no. 1. A United States resident since 1994, Sharapova has won 26 WTA singles titles, including three Grand Slam singles titles at the 2004 Wimbledon, 2006 US Open and 2008 Australian Open. She has also won the year-end WTA Tour Championships in 2004. The Women's Tennis Association has ranked Sharapova world no. 1 in singles on four separate occasions. She became the world no. 1 for the first time on August 22, 2005, and last regained the ranking for the fourth time on May 19, 2008. As of May 28, 2012, Sharapova is ranked world no. 2. She has been in six Grand Slam finals with the final record 3–3.

Sharapova made her professional breakthrough in 2004 at age 17, when she defeated two-time defending champion and top seed Serena Williams in the 2004 Wimbledon final for her first Grand Slam singles title. She entered the top 10 of the WTA Rankings with the win. Despite not winning a major in 2005, Sharapova briefly held the no. 1 ranking, and reached three Grand Slam semifinals, losing to the eventual champion each time. She won her second major at the 2006 US Open defeating then-world no. 1 Amélie Mauresmo in the semifinals and world no. 2 Justine Henin in the final.

Venus Ebony Starr Williams (born June 17, 1980), is an American professional tennis player who is a former World No. 1 and is ranked World No. 53 as of May 28, 2012 in singles. She has been ranked World No. 1 in singles by the Women's Tennis Association on three separate occasions. She became the World No. 1 for the first time on February 25, 2002, becoming the first black woman to achieve this feat during the Open Era.

Her 21 Grand Slam titles ties her for twelfth on the all time list and is more than any other active female player except for her younger sister Serena Williams. Venus Williams' titles consist of: seven in singles, twelve in women's doubles, and two in mixed doubles. Those seven Grand Slam singles titles ties her with four other women for twelfth place on the all-time list. Her five Wimbledon singles titles ties her with two other women for eighth place on the all-time list. Venus Williams is one of only three women in the open era to have won five or more Wimbledon singles titles. From the 2000 Wimbledon Championships through the 2001 US Open, Williams won four of the six Grand Slam singles tournaments held. She is one of only five women in the open era to win 200 or more main draw Grand Slam singles matches.