Johanna Konta (born 17 May 1991) is a British former professional tennis player, having represented Australia until 2012. She won four singles titles on the WTA Tour, as well as 11 singles and four doubles titles on the ITF Women's Circuit. The former British no. 1 reached a career-high singles ranking of world no. 4 on 17 July 2017. She reached the semi-finals of the Australian Open, Wimbledon and the French Open. Born to Hungarian parents in Sydney, Australia, Konta moved to England when she was 14. She has treble citizenship: Hungarian, Australian and British. She switched her sporting allegiance from Australia to Great Britain after she became a British citizen in May 2012. Konta achieved a steep rise in her WTA ranking from the spring of 2015 to late 2016, climbing from 150th to inside the world's top ten, becoming the first Briton to be ranked amongst the WTA's top ten since Jo Durie was ranked fifth over 30 years prior. This period included her best Grand Slam result up to that time, the semi-finals of the 2016 Australian Open, a quarter-final appearance at the Rio Summer Olympics and her maiden WTA title in Stanford. In 2017, she won the Miami Open and reached the semi-final at Wimbledon. Konta had another successful season in 2019, reaching the semi-finals at the French Open and the quarter-finals at Wimbledon and the US Open. Konta retired on 1 December 2021, after struggling with a long-term right knee injury which led to her ranking dropping outside the top 100. Personal life Johanna Konta was born in Sydney, Australia, on 17 May 1991, the daughter of Hungarian parents Gábor, a hotel manager, and Gabriella, a dentist. Her parents had emigrated separately from Hungary and met in Australia. One of Konta's grandfathers, Tamás Kertész (1929–1989), played football for Ferencvárosi TC; he won two international caps for Hungary in the 1950s and later coached the Ghana national team. Konta has a half sister, Eva Mumford, from her father's previous marriage. Her sister is married to former Australian rules football player Shane Mumford. Konta's childhood was spent in Collaroy on Sydney's Northern Beaches, where she was introduced to tennis at an after-school programme at the age of eight. When she was 14, she attended the Sánchez-Casal Tennis Academy in Barcelona for 15 months, during which time her parents settled in Eastbourne, England. Konta became a British citizen