35th birthday of Martina Hingis - 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.