Chang Kai-chen (traditional Chinese: 張凱貞; simplified Chinese: 张凯贞; pinyin: Zhāng Kǎizhēn; born January 13, 1991) is a professional Taiwanese tennis player. Her highest WTA singles ranking is 82nd, which she reached on July 5, 2010. Her career high in doubles is 69th, which she reached on June 13, 2011.

Chang was born in Taiwan and is a right-handed player. She qualified for the 2009 U.S. Open. Chang beat 25th seed Kaia Kanepi 6–0, 2–6, 6–2 in her first round match. At the 2009 Toray Pan Pacific Open, Chang defeated WTA No. 1 Dinara Safina 7–6, 4–6, 7–5 in her second round match.

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.

Heather Miriam Watson (born 19 May 1992) is a British female tennis player. Born in Guernsey, she trains and lives at the Nick Bollettieri Tennis Academy in Florida, USA. Watson has won one major title at the 2009 US Open Juniors, two senior ITF titles and won gold at the 2008 Commonwealth Youth Games. She has been as high as no. 3 in the world on the ITF Junior Circuit. Watson is rated as the British senior women's number 3, behind Elena Baltacha and Anne Keothavong, and is ranked at 110 in the world.

Heather Watson was born 19 May 1992 in Guernsey to Papua New Guinea national Michelle and Manchester-born Englishman Ian Watson, who was the managing director of Guernsey Electricity from 1995 until his retirement in 2010. She has one brother and two sisters. Heather Watson started playing tennis at the age of seven, and at age twelve she left home to go to the American Nick Bollettieri Tennis Academy in Florida.

In 2006, Watson won the British Under-14 Championship. The following year Watson won the British Under-16 Championship, and reached the semi-finals of the British Under-18 Championship. She lost in the Under-18 semi-finals again in 2008 to eventual winner Tara Moore. In October, Watson travelled to Pune to compete at the 2008 Commonwealth Youth Games. There she won the gold medal, winning the final against Kyra Shroff. Mother Michelle left her job in 2008 to travel full-time with Heather Watson around the world junior circuit.

Misaki Doi (土居美咲, Doi Misaki^?) (born April 29, 1991) is a professional Japanese tennis player. Her highest WTA singles ranking is 116, which she reached on March 21, 2011 (however, she will likely improve on this ranking after the 2011 Wimbledon Championships – Women's Singles, where she has currently advanced to the third round of a Grand Slam event for the first time) Her career high in doubles is 222, which she reached on May 10, 2010.

Irena Pavlovic (Serbian: Ирена Павловић, Irena Pavlović; born 28 September 1988) is a French female tennis player of Serbian descent. Born in Serbian capital Belgrade, she moved to Paris when she was three. Pavlovic won three singles and 13 doubles events organized by the International Tennis Federation, and is currently ranked World No. 202. She was awarded with wild cards for two WTA in 2009, Internationaux de Strasbourg and French Open, which was her first grand slam appearance. Pavlovic lost in the first round both times to, respectively, Kristina Barrois and Akgul Amanmuradova. In her career, she defeated players such as Monica Niculescu, Anne Keothavong and Marina Eraković.

Pavlovic was born in Belgrade (Serbia now, SFR Yugoslavia then) to Dragan and Mirjana. She has a brother, Filip, who is a basketball player. She began playing tennis aged four, with Monica Seles as her idol. Russian tennis player Arina Rodionova is a good friend of Pavlovic, who is fluent in French, Serbian and English. Upon being coached by Christophe Serriere and Danyel Ristic, she was coached at famous academy of Patrick Mouratoglou.