Martina Hingis (born September 30, 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.