Jelena Dokić (Serbian: Јелена Докић; born Osijek, 12 April 1983) is an Australian female professional tennis player.

During the height of her career, she played for Serbia and Montenegro (Federal Republic of Yugoslavia prior to February 2003) and reached a career-high ranking of World No. 4 on 19 August 2002. After several family-related difficulties (mostly involving her father), she slowly slipped down the rankings in 2006. She made a serious return to tennis in 2008, and after winning three ITF tournaments that year, rose to World No. 187 going into the 2009 Australian Open. She finished 2009 in the top 100, but declined in 2010. Her 2011 season has seen a resurgence in Dokić's form and abilities."

The highlights of Dokić's career include reaching the semifinals at Wimbledon and the Sydney Olympics in 2000 and reaching the quarterfinals at the French Open in 2002 and the Australian Open in 2009. Other highlights include beating several former World No. 1 players: Martina Hingis in the first round of Wimbledon in 1999, Venus Williams at the 2000 Italian Open and Kim Clijsters at the 2003 Zürich Open. Other high-calibre players whom Dokić has defeated include Caroline Wozniacki, Jelena Janković, Monica Seles, Justine Henin, Amélie Mauresmo, Mary Pierce, Elena Dementieva, Francesca Schiavone, Anna Chakvetadze and Jennifer Capriati. 

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.

Martina Hingis (born 30 September 1980) is a retired Swiss professional tennis player who spent a total of 209 weeks as World No. 1. She won five Grand Slam singles titles (three Australian Opens, one Wimbledon, and one US Open). She also won nine Grand Slam women's doubles titles, winning a calendar year doubles Grand Slam in 1998, and one Grand Slam mixed doubles title.

Hingis set a series of "youngest-ever" records before ligament injuries in both ankles forced her to withdraw temporarily from professional tennis in 2002 at the age of 22. After several surgeries and long recuperations, Hingis returned to the WTA tour in 2006. She then climbed to world number 6 and won three singles titles. On 1 November 2007, Hingis announced her retirement from tennis after testing positive for cocaine during Wimbledon in 2007. She denied using the drug, but decided not to appeal the imminent ban.

In June 2011, she was named one of the "30 Legends of Women's Tennis: Past, Present and Future" by Time.

Hingis was born in Košice, (then part of Czechoslovakia, now in modern Slovakia), to accomplished tennis players Melanie Molitorová and Karol Hingis. Molitorová was a professional tennis player, who was once ranked tenth among women in Czechoslovakia, and was determined to develop Hingis into a top player as early as pregnancy. Her father was ranked as high as nineteenth in the Czechoslovakian tennis rankings. Hingis's parents divorced when she was six, and she and her mother relocated around a year later to Trübbach in Switzerland. Her father, who continued to live in Košice as a tennis coach, said in 1997 that he had seen little of his daughter after the split.