Martina Navratilova is a Czech-American former professional tennis player. She was ranked world No. 1 in women's singles for 332 weeks (second-most all time), including as the year-end No. 1 seven times, and was world No. 1 in women's doubles for a record 237 weeks. Navratilova won 167 top-level singles titles and 177 doubles titles (both the Open Era records), including an Open Era record 49 major titles: 18 in singles, an all-time record 31 in women's doubles, and an Open Era record 10 in mixed doubles. Her nine Wimbledon singles titles are an all-time record. Alongside Chris Evert, her greatest rival, Navratilova dominated women's tennis for much of the 1980s.
Navratilova won a record six consecutive singles majors across 1983 and 1984 while simultaneously winning the Grand Slam in doubles. Navratilova claims the best professional season winning percentage, 98.9% in 1983 (going 86–1 for the season), and the longest all-surface winning streak of 74 straight match wins. She reached the Wimbledon singles final 12 times, including for nine consecutive years from 1982 through 1990.