Martina Hingis (born 30 September 1980) is a Swiss professional tennis player who spent a total of 209 weeks as world No. 1. She has won five Grand Slam singles titles (three at the Australian Open, one at Wimbledon, and one at the US Open), eleven Grand Slam women’s doubles titles, winning a calendar-year doubles Grand Slam in 1998, and four Grand Slam mixed doubles titles; for a combined total of twenty major titles.
Hingis set a series of “youngest-ever” records, including youngest Grand Slam singles champion of the 20th century and youngest-ever world No. 1 in both singles and doubles, before ligament injuries in both ankles forced her to withdraw temporarily from professional tennis in 2002 at the age of 22. After several surgeries and long recuperations, Hingis returned to the WTA tour in 2006, climbing to world No. 6 and winning three singles titles. She retired in November 2007.
Widely considered an all-time great, Tennis Magazine ranked her in 2005 as the 22nd-greatest player, male or female, of the previous 40 years. She was named one of the “30 Legends of Women’s Tennis: Past, Present and Future” by Time in June 2011. In 2013, Hingis was elected into the International Tennis Hall of Fame.
In July 2013, Hingis came out of retirement to play a doubles tournament, partnering Daniela Hantuchová in California, and said she might also play singles and doubles tournaments in the future. She played doubles with Sabine Lisicki, whom she also coached briefly in 2014, until Wimbledon. After that, she partnered with Flavia Pennetta. She currently plays with Sania Mirza and is ranked world No. 2 in doubles as of October 2015; together they won back-to-back Grand Slam titles at the Wimbledon Championships and the US Open in 2015. She also won three Grand Slam mixed doubles titles in 2015, partnering Leander Paes.
In 2015, Hingis became the first Global Ambassador for the International Tennis Hall of Fame.