Kaia Kanepi (; born 10 June 1985) is an Estonian professional tennis player. She achieved her career-high ranking of world No. 15 on 20 August 2012 and has won four singles titles on the WTA Tour. Described as a 'resident Grand Slam upset specialist' by The Guardian - with 19 wins over seeded players in the first week of Grand Slams; only two active players (Victoria Azarenka and Venus Williams) have more. She has also reached seven Grand Slam quarterfinals in all four championships (French Open in 2008 and 2012, Wimbledon in 2010 and 2013, the US Open in 2010 and 2017, and Australian Open 2022), becoming the first Estonian to achieve this and was the first Estonian to be ranked inside the world's top 15. Kanepi's numerous achievements have made her one of Estonia's most famous and successful professional tennis players in history. Kanepi reached her first final in 2006, becoming the first Estonian female player to do so, at the Gaz de France Stars where she lost to Kim Clijsters. She then won her first singles title in Palermo in 2010, also becoming the first Estonian female player to win a title. Career Kaia Kanepi was born in Haapsalu. Her father, Jaak (a real estate broker) and mother Anne (a homemaker) played tennis. They also have daughters Kadri, who won a tennis scholarship to study in the United States, and Karin, a dedicated horse rider. Kaia, who always watched her parents and sisters play, discovered her love for tennis at an early age. She started playing at the age of eight. Her family has always supported her desire to play professional tennis. She reached world number one in the International Tennis Federation (ITF) junior rankings before turning professional in 2000. 1994–2003 Kaia was trained by Tiit Kivistik. From 2003 until the autumn of 2007, Kaia was coached by Andrei Luzgin. After Luzgin, Fredrik Lovén from Sweden became her coach, but their partnership ended in February 2008. Kanepi's next coach (until September 2008) was Pablo Giacopelli. From November 2008, she was coached by Luca Appino. After November 2009, Kanepi was coached by fellow Estonia pro Mait Künnap. In February 2010, she broke up with her coach and agent. In April, she started to work with Silver Karjus, who was her coach until March 2012. From 2013–2014, she was coached by Märten Tamla. Kanepi is currently coached by Indrek Tustit