Sara Errani (born April 29, 1987 in Bologna, Italy), nicknamed "Poco Gigante", is a professional female tennis player from Italy. On May 21, 2012, she reached a new career-high of no. 23 on the Tour rankings. On May 14, 2012, Errani became a top 10 doubles player and had a career high rank of World No. 8. She won five WTA titles in her career, and also has two ITF Titles.

At age 12 her father sent her to the Nick Bollettieri Tennis Academy in Florida. At 16 she moved to Valencia, in Spain, to be coached by Pablo Lozano and David Andres.

Errani competed in her first event at the $10,000 Cagliari event in her native country of Italy in 2002 where she lost to Sun Tiantian 6–1, 6–0. She continued to compete in the ITF, where her best performance of the year was a semifinal appearance in $10,000 Zaton. She continued to participate mainly on the ITF, where she won her first tournament 6–1, 6–4 over Lucia Jiminez in Melilla, Italy 2005.

Her first WTA title of her career was in the Internazionali Femminili di Palermo, where she defeated Mariya Koryttseva. On July 27, 2008, she captured her second career title in two weeks defeating Anabel Medina Garrigues, 6–3, 6–3. She has also won six doubles WTA titles.

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.

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.