Christine Marie "Chris" Evert, known as Chris Evert-Lloyd from 1979 to 1987, is a former World No. 1 professional tennis player from the United States. She won 18 Grand Slam singles championships and three doubles titles. She was the year-ending World No. 1 singles player in 1974, 1975, 1976, 1977, 1978, 1980, and 1981. Overall Evert won 157 singles championships and 29 doubles titles.
Evert reached 34 Grand Slam singles finals, more than any player, man or woman, in the history of professional tennis. She reached the semifinals or better, in singles, of 52 of the 56 Grand Slams she played, including the semifinals or better of 34 consecutive Grand Slams entered from the 1971 US Open through the 1983 French Open. Evert never lost in the first or second round of a Grand Slam singles tournament. In Grand Slam singles play Evert won a record seven championships at the French Open and a record six championships at the US Open.
Evert's career winning percentage in singles matches of 90.05% is the highest in the history of Open Era tennis, for men or women. On clay courts, her career winning percentage in singles matches of 94.05% remains a WTA record.