John Patrick McEnroe, Jr. is a former World No. 1 professional tennis player from the United States.
He won seven Grand Slam singles titles, 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 those two events, a record he shares with Ivan Lendl.
During his career, McEnroe won 77 ATP-listed singles titles and 71 in doubles.
McEnroe is known for his shot-making artistry and volleying skills; for his rivalries with Björn Borg, Jimmy Connors and Ivan Lendl; and for his confrontational on-court behavior which frequently landed him in trouble with umpires and tennis authorities.
His match record of 82–3 in 1984 remains the best single season win rate of the Open Era.
In 1981, 1983 and 1984 McEnroe was the ITF World Champion for Men's singles.
He was also named as the ATP player of the year in 1981, 1983 and 1984.
McEnroe is often rated among the greatest tennis players of all time, especially for his touch on the volley.
McEnroe is a former Captain of the United States Davis Cup team.