John McEnroeJohn McEnroe (born February 16, 1959) was a top ranked professional tennis player and was No.1 player in the world four times between 1981 and 1984.
He was an accomplished doubles player as well, and finished career with 77 singles championships and 77 more in men's doubles titles. He was famous for his epic matches against rivals Jimmy Connors and Bjorn Borg.
Among his Grand Slam titles:Stanford University, and won the NCAA singles title in 1978. McEnroe became famous for his volatile temperament, giving rise to catchphrases such as "You cannot be serious". At first subject to booing by crowds, he gradually won their appreciation. He is now a tennis commentator and television presenter.