Shahar Pe'er ( /ˈʃɑːhɑr ˈpeɪ.ər/; Hebrew: שחר פאר, IPA: [ˈʃaχaʁ peˈʔeʁ]; born May 1, 1987) is an Israeli professional tennis player. Her career-high singles ranking is World No. 11, which she achieved on January 31, 2011 (it is the highest ranking ever for an Israeli singles tennis player, male or female).

She attained her best Grand Slam singles result when she reached the quarter-finals at the 2007 Australian Open and the 2007 US Open. She also reached the Women's doubles final at the 2008 Australian Open with Victoria Azarenka. Pe'er has won five WTA singles titles, and three WTA doubles titles.

As of August 29, 2011, Pe'er was ranked World No. 24 in singles, and No. 33 in doubles.

Pe'er was born in Jerusalem. Pe'er's father, Dovik, is a computer software specialist and her mother, Aliza, is a homemaker. She began playing tennis at the age of six when she joined her brother Shlomi and her sister Shani in tennis lessons.

At the age of 19, Pe'er joined the Israeli military, as military service is mandatory in Israel, where she excelled in rifle marksmanship during her elementary combat training. When not abroad participating in tennis tournaments, she spent her mornings working as an administrative secretary for the Israeli military, and her afternoons practicing tennis.

Elina Svitolina (Ukrainian: Еліна Світоліна; born September 12, 1994) is a junior Ukrainian tennis player. Her highest WTA singles ranking is 202, which she reached on January 2, 2012. Her career high in doubles is 378, achieved on November 28, 2011. She reached her first professional singles final at the ITF $25,000 tournament in Kharkiv in May 2010.

Svitolina best achievement so far is by winning the Roland Garros girls event in 2010, beating Tunisian Ons Jabeur in the final.

Elina Svitolina was born to Elena Svitolina and Mikhaylo Svitolin and has a brother named Julian. She resides at Kharkiv, Ukraine and is currently being coached by Andrey Lutsenko. Her favourite surfaces are grass and clay.

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.

Svetlana Aleksandrovna Kuznetsova ( Светла́на Алекса́ндровна Кузнецо́ва (help·info)); born June 27, 1985) is a Russian professional tennis player and as of May 7, 2012 ranked No. 28 in the WTA singles and No. 31 in the doubles ranking. Kuznetsova has appeared in four singles Grand Slam finals, winning two, and has also appeared in seven doubles finals, winning twice. She has qualified five times for the round-robin stage of the WTA Tour Championships but has never qualified for the semifinals.

Her first Grand Slam title came at the 2004 US Open, making her the third Russian woman to win a Grand Slam title, after Anastasia Myskina and Maria Sharapova who won at the 2004 French Open and 2004 Wimbledon tournaments respectively. Kuznetzova's second Grand Slam title was the 2009 French Open, defeating Serena Williams in the quarterfinal, Samantha Stosur in the semifinal, and compatriot Dinara Safina in the final in straight sets. At the 2006 French Open and the 2007 US Open singles tournament she was the runner-up, both times to Belgian player Justine Henin. As a result, Kuznetsova obtained her new WTA ranking of No. 2, her best to that date. Kuznetsova has won a total of 13 WTA and 1 ITF singles titles and 15 WTA doubles titles to date and US$16,372,146 in prize money, making her the second top Russian earner on court and number 11 of all female tennis players to date and No. 5 of active players, after only Serena Williams, Venus Williams, Kim Clijsters, and Maria Sharapova respectively.

Caroline Wozniacki (born 11 July 1990) is a Danish professional tennis player. She is a former world no. 1 on the WTA Tour. As of 23 January 2012, she held this position for 67 weeks. She is the first Scandinavian woman to hold the top ranking position and 20th overall.

Since her WTA debut in 2005, she has improved her year-end ranking each year until finishing on top in both 2010 and 2011. She has won 18 WTA singles titles as of August 2011, three in 2008, three in 2009, six in 2010 (the most since Justine Henin's ten in 2007), and six in 2011. She was runner-up at the 2009 US Open and the 2010 WTA Tour Championships in Doha to Kim Clijsters. She won the 2006 Wimbledon Girls' Singles title but has yet to win a women's Grand Slam title. She also holds two WTA titles in doubles.

Wozniacki is the daughter of Polish Roman Catholicimmigrants, Piotr and Anna Wozniacki. Anna played on the Polish women's national volleyball team, and Piotr played professional football. The couple moved to Denmark when Piotr signed for the Danish football club Boldklubben 1909. Wozniacki's older brother Patrik Wozniacki is a professional footballer for Hvidovre IF in Denmark.