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Madison Keys

Madison Keys (born February 17, 1995) is an American professional tennis player.

As of November 2015, she is ranked world no.18 in singles and is the third-highest ranked American player overall. Since the age of 9, Keys has been part of the Chris Evert Academy in Boca Raton, Florida. She is one of the youngest tennis players to win a match on the WTA Tour, at the age of 14 years and 48 days, by beating world no. 81 Alla Kudryavtseva at the 2009 MPS Group Championships. Her highest junior ranking was no. 16 on September 12, 2011.

On June 21, 2014, Keys won her first WTA Tour title, the Aegon International, a Premier event. On February 2, 2015, she entered the Top 20 for the first time in her career, following her semifinal appearance at the Australian Open.

Tennis career

2009–12: Early career

During her early years, Keys played mostly on the ITF tour, where she won three titles in singles and one in doubles.

Keys' first appearance on the WTA Tour came at the 2009 Ponte Vedra Beach Championships, where she received a wildcard into the main draw. She beat world no. 81 Alla Kudryavtseva in the first round, but she was then defeated by top seed Nadia Petrova in straight sets. In July 2009, Keys played World Team Tennis as a member of the Philadelphia Freedoms. Still only 14 years old, she beat reigning Wimbledon champion Serena Williams in women's singles by a score of 5–1.

Ana Ivanovic

Ana Ivanovic (Serbian: Ана Ивановић, Ana Ivanović;Serbian pronunciation: [âna iʋǎːnoʋit͡ɕ]; born 6 November 1987) is a Serbian professional tennis player who as of August 10, 2015 is ranked No. 6 in the world by the Women's Tennis Association.Ranked No. 1 in the world in 2008, she beat Dinara Safina to win the 2008 French Open, was the runner-up at the 2007 French Open and the 2008 Australian Open. She has also qualified for the annual WTA Tour Championships three times, in 2007, 2008 and 2014 and has won the year-end WTA Tournament of Champions twice, in 2010 and 2011.

Competing as a professional since 2003, Ivanovic has won 15 WTA Tour singles titles, including one Grand Slam singles title. As of 2014, she has career earnings of just over $14 million. In June 2011, she was named one of the "30 Legends of Women's Tennis: Past, Present and Future" by Time and was also included on the list of Top 100 Greatest Players Ever (male and female combined) by reporter Matthew Cronin.

Her first breakthrough came at the 2004 Zurich Open, where she qualified and was narrowly beaten by Venus Williams in the second round in two tiebreak sets. By the age of 18 Ivanovic had already defeated established players, such as Svetlana Kuznetsova, Nadia Petrova, Vera Zvonareva and Amélie Mauresmo. She also has defeated many other past and present top players including Maria Sharapova, Venus Williams, Serena Williams, Dinara Safina, Martina Hingis, Jelena Janković, Agnieszka Radwańska, Caroline Wozniacki, Petra Kvitová, Simona Halep and Victoria Azarenka. When on form Ivanovic is known for her aggressive style of play and impressive forehand, described by Petrova as, "the best out there."

Serena Williams

Serena Jameka Williams (born September 26, 1981) is an American professional tennis player who is ranked No. 1 in women's singles tennis. The Women's Tennis Association (WTA) has ranked her world No. 1 in singles on six separate occasions. She became the world No. 1 for the first time on July 8, 2002, and achieved this ranking for the sixth time on February 18, 2013. She is the reigning champion of the French Open, Wimbledon and Olympic women's singles and doubles. Williams is popularly regarded as the greatest female tennis player of all time.

Williams holds the most major singles, doubles, and mixed doubles titles combined amongst active players, male or female. Her record of 36 major titles puts her fifth on the all-time list and second in the open era with: 21 in singles, 13 in women's doubles, and two in mixed doubles. She is the most recent player, male or female, to have held all four major singles titles simultaneously (2002–03 and 2014–15), the fifth woman ever to do so and only the third player, male or female, to achieve this record twice after Rod Laver and Steffi Graf. She is also the most recent player, together with her sister Venus Williams, to have held all four Grand Slam women's doubles titles simultaneously (2009–10).