Claim: Martina Hingis retired.

Martina Hingis -LRB- born 30 September 1980 -RRB- is a Czechoslovak-born Swiss professional tennis player who spent a total of 209 weeks as the singles world No. 1 . She has won five Grand Slam singles titles , twelve Grand Slam women 's doubles titles , winning a calendar-year doubles Grand Slam in 1998 , and five Grand Slam mixed doubles titles ; for a combined total of twenty-two major titles . In addition , she has won the season-ending WTA Championships two times in singles and three times in doubles and is an Olympic medalist .   Hingis set a series of `` youngest-ever '' records during the 1990s , including youngest-ever Grand Slam champion and youngest-ever world No. 1 . Before ligament injuries in both ankles forced her to withdraw temporarily from professional tennis in 2002 , at the age of 22 , she had won 40 singles titles and 36 doubles titles and , according to Forbes , had been the highest-paid female athlete in the world for five consecutive years , 1997 to 2001 . After several surgeries and long recuperations , Hingis returned to the WTA tour in 2006 , climbing to world No. 6 and winning three singles titles , and also receiving the Laureus World Sports Award for Comeback of the Year . She retired in November 2007 , following months of injuries and a positive test for a metabolite of cocaine during the 2007 Wimbledon Championships , which led to a two-year suspension from the sport .   In July 2013 , Hingis came out of retirement to play the North American hard-court season , partnering Daniela Hantuchová . After achieving moderate success in 2014 playing with Sabine Lisicki and Flavia Pennetta , she partnered with Sania Mirza in March 2015 ; together they won three consecutive Grand Slam titles . During her comeback , Hingis also won all four Grand Slam mixed doubles tournaments alongside Leander Paes and a silver medal partnering Timea Bacsinszky at the 2016 Summer Olympics in Rio de Janeiro .   Widely considered an all-time tennis great , Hingis was ranked by Tennis magazine in 2005 as the 8th-greatest female player of the preceding 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 , and was appointed two years later the organization 's first ever Global Ambassador .