Jarmila Gajdošová (born 26 April 1987 in Bratislava, Czechoslovakia), known as Jarmila Groth from 2009 to 2011, is a Slovak-Australian tennis player. She turned professional in 2005.

Although she had already been playing in senior events for some years by the time, the highlights of her junior career came as she reached the semifinals at two junior Grand Slam tournaments. In the 2003 Wimbledon junior competition she lost in semifinal to the eventual winner Kirsten Flipkens. In the Australian Open junior competition, 2004, she reached semifinal in both singles and doubles (with Shahar Pe'er). Both times she lost to Nicole Vaidišová. Another success came in winning doubles at the Italian Open junior tournament in 2003 with Andrea Hlaváčková.

Gajdošová began competing on the ITF circuit just days after her fourteenth birthday in late April 2001, and that year entered three ITF tournaments, winning two matches and losing three. In 2002, she again entered only three tournaments, but this time won four matches and lost three.

Angelique Kerber (born 18 January 1988 in Bremen) is a professional German tennis player. Kerber has a career high ranking of world no. 10, achieved on 21 May 2012 and is currently the highest ranked German. She has competed as a professional since 2003, and has won 11 ITF titles, and two WTA titles at the 2012 Open GDF Suez and the 2012 e-Boks Open. She has also reached one Grand Slam semi-final at the 2011 US Open.

She is born in Bremen, to father Slawek Kerber and mother Beata, and has one sister. She started playing tennis at age 3, eventually joining the junior circuit, making inroads at events in Germany and elsewhere in Europe, but didn't win a junior title before 2003 at which point she turned professional at the age of 15. Kerber speaks German, Polish and English.

In 2003 obtained her first top 100 victory by defeating Marion Bartoli in the qualifying draw of the WTA German Open 3–6, 6–3, 6–4.

In 2004 Kerber started the year by reaching the finals of an ITF event in Warsaw losing to Marta Domachowska 7–6, 3–6, 6–3 in the finals. She attained her first ITF title entering as a qualifier in Opole, Poland, by defeating Elena Tatarkova 6–2, 6–2 in the finals.

Agnieszka Radwańska [aɡˈɲɛʂka radˈvaɲska] ( listen) (born 6 March 1989 in Kraków) is a Polish professional tennis player. As of 28 May 2012, she is ranked world no. 3. Known for constructing points and making intelligent use of the court, she has won ten WTA singles titles.

In 2007, Radwańska became the first Polish player to claim a WTA singles title when she won the Nordea Nordic Light Open. The following year, she became the first Polish player to reach the WTA Top 10. Radwańska has won two WTA Awards, being voted Most Impressive Newcomer in 2006, and Fan Favorite Singles Player in 2011. She has also reached five Grand Slam quarterfinals.

Agnieszka Radwańska was born in Kraków. She began playing tennis at the age of four, after her father introduced her to the sport. Her younger sister, Urszula, is also a tennis player. Radwańska has named Pete Sampras and Martina Hingis as inspirations. In 2009, Radwańska became a WTA ambassador for Habitat for Humanity. She has also studied tourism at universities in Kraków.

Romina Sarina Oprandi (born March 29, 1986 in Jegenstorf, Canton of Bern, Switzerland) is a female professional tennis player. She has dual Swiss-Italian citizenship and represented Italy from her professional debut in 2005 until January 2012, when she joined the Swiss tennis federation. Her highest singles ranking was no. 46 on September 25, 2006.

She first came to prominence in the top tier of women's tennis when she reached the quarterfinals of a WTA Tier I event in Rome as a qualifier, barely missing out on a place in the semifinals with a loss to Svetlana Kuznetsova, 4–6, 7–5, 6–7. She then made appearances at the 2006 Wimbledon and the US Open, losing in the first round of each to difficult opponents in Francesca Schiavone and Svetlana Kuznetsova once again. After the end of her US Open campaign, Romina went on to win yet another ITF singles title at Denain, which would be her best result for the rest of the 2006 season, struggling with injury problems and losing matches early on in tournaments.

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.