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 three active players (Victoria Azarenka, Venus Williams and Serena 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 reached the final at the Citi Open 2022 but lost to Liudmila Samsonova, 4-6, 6-3, 6-3.