Christine Marie Evert is an American former professional tennis player. One of the most successful players of all time, she was ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA) for 260 weeks (fourth-most of all time), and finished as the year-end No. 1 seven times: 1974–1978, 1980 and 1981. Evert won 157 singles titles, including 18 majors (among which a record seven French Open titles and a joint-record six US Open titles). Alongside Martina Navratilova, her greatest rival, Evert dominated women's tennis from the mid-1970s to the mid-1980s.
In singles, Evert reached the semifinals or better in 52 of the 56 majors she played, including at 34 consecutive majors entered from the 1971 US Open through the 1983 French Open. She never lost in the first or second round of a major, and lost in the third round only twice. Evert holds the record of most consecutive years (13) of winning at least one major title, and contested an all-time record 34 major women's singles finals. Evert's career winning percentage in singles matches of 89.97% (1309–146) is the second highest in the Open Era, for men or women.