John Patrick McEnroe, Jr. (born February 16, 1959) is a former World No. 1 professional tennis player from the United States. During his career, he won seven Grand Slam singles titles (three at Wimbledon and four at the US Open), nine Grand Slam men's doubles titles, and one Grand Slam mixed doubles title. McEnroe also won a record eight season ending championships, comprising five WCT Finals titles and three Masters Grand Prix titles from twelve final appearances at these two events, a record he shares with Ivan Lendl. He posted the best single season win-loss record in the Open Era in 1984 at 96.47% (82/3). In addition he won 19 Championship Series top tier events of the Grand Prix Tour that were the precursors to the current Masters 1000.
Contributions by Tennis expert, Zaxem, and Krosero.