Aniek van Koot (born 15 August 1990) is a Dutch wheelchair tennis player who is a former world No.

Van Koot has won 26 major titles, having won the 2013 Australian Open, 2013 US Open and 2019 Wimbledon Championships in wheelchair singles combined with 23 major titles in doubles, variously partnering Florence Gravellier, Daniela di Toro, Jiske Griffioen and Diede de Groot.

Van Koot has completed the calendar year Grand Slam in doubles on two occasions, in 2013 with Griffioen, and in 2019 alongside de Groot.

[3] During the 2006 season van Koot won doubles titles in Livorno with Korie Homan,[4] Jesolo with Sevenans.

[18] Van Koot reached the final of the singles competitions in Nottingham,[19] Hilton Head,[20] Jambes and Gross Siegharts.

[23] In doubles competitions van Koot won titles in Christchurch and Sardinia with Jiske Griffioen.

[33] The 2011 season saw van Koot win singles titles in Adelaide,[34] Paris,[35] Geneva,[36] Jambes and Salzburg.

[42] Partnering Griffioen in the doubles events the pair won titles in Sydney,[43] Pensacola,[44] Boca Raton,[39] Paris,[45] Nottingham and St.

[52][53] Van Koot played doubles with other players as well, having success with Annick Sevenans in Geneva,[36] Jambes and Salzburg.

[61][62] Van Koot additionally picked up the silver medal at the Paralympic Games and was a finalist at Roland Garros and Melbourne.

[68][69] The pair also won their first Grand Slam as a team at Wimbledon and claimed the silver medal at the Paralympics.

[83] Van Koot competed in the other Grand Slam events losing in the semi-final of Roland Garros but winning the US Open.

[84][85] As a result of her success at the Australian Open and Esther Vergeer not playing, van Koot ascended to the world number one spot in the rankings.

[89][90] The pair won their first Australian,[91] French and US Open titles and retained the Wimbledon crown to complete the Grand Slam.