Martina Hingis is a retired professional tennis player from Switzerland, born on September 30, 1980. She became a prominent figure in women's tennis during the late 1990s and early 2000s, known for her exceptional skills and strategic play. Hingis won five Grand Slam singles titles and held the world No. 1 ranking for a total of 209 weeks. In addition to her singles success, Hingis also excelled in doubles, winning 13 Grand Slam doubles titles. Her achievements have made her one of the most successful female tennis players in history, and she was inducted into the International Tennis Hall of Fame in 2013.