Hana Mandlíková (born 19 February 1962) is a former professional tennis player from Czechoslovakia who later obtained Australian citizenship. During her career, she won four Grand Slam singles titles: the 1980 Australian Open, 1981 French Open, 1985 US Open, and the 1987 Australian Open. She was also the runner-up at four Grand Slam singles events, including the Wimbledon finals of 1981 and 1986, and won one Grand Slam women's doubles title, the 1989 US Open with Martina Navratilova.
Mandlikova had a career high singles ranking of number three, and was ranked in the world top 50 for 12 consecutive seasons (1978–89), including seven in the top 10. She led Czechoslovakia to three consecutive Fed Cup titles from 1983–1985, and was only the third woman to win grand slam titles on grass, clay, and hard courts, joining Chris Evert and Martina Navratilova. She defeated both Evert and Navratilova on consecutive days to accomplish this feat at the 1985 US Open. She retired in 1990, and went on to coach Jana Novotná to the 1998 Wimbledon singles title and a career high ranking of number two. She also served as the Czech Republic's Olympic and Fed Cup coach until 1996.