Christine Marie "Chris" Evert 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 U.S. Open through the 1983 French Open. Evert never lost in the first, second or fourth 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 U.S. Open.
Evert's career winning percentage in singles matches of 90.05% is the second best in the history of professional tennis, man or woman, after Margaret Court's 91.37% in the Open Era. On clay courts her career winning percentage in singles matches of 94.05% remains a WTA record.
If you can react the same way to winning and losing, that's a big accomplishment. That quality is important because it stays with you the rest of your life, and there's going to be a life after tennis that's a lot longer than your tennis life.