Martina Hingis (born September 30, 1980 in KoÅ¡ice, Czechoslovakia, now Slovakia) is a former World No. 1-ranked Swiss tennis player. She has won five Grand Slam singles titles (three Australian Open, one Wimbledon, and one US Open). She has also won nine Grand Slam women’s doubles titles, and in 1998 captured all four Grand Slam women’s doubles crowns. She set a series of “youngest-ever” records before ligament injuries in both of her ankles forced her to withdraw from pro tennis at the relatively young age of 22. After several surgeries and long recuperations, the 25-year-old Hingis announced on November 29, 2005, that she would return to the WTA tour. She made her professional comeback on January 2, 2006 at a low-key tournament in Gold Coast, Australia. In the 2006 Australian Open, she won several singles matches to advance to the quarter final; she also won her first Grand Slam mixed-doubles title with Mahesh Bhupathi. Hingis won her first singles title in over four years when she beat Dinara Safina 6-2 7-5 in the final of the Italian Open in Rome on May 21, 2006. She is currently dating fellow tennis player Radek Stepanek.