John Patrick McEnroe Jr. (born February 16, 1959) is an American former World No. 1 professional tennis player, often rated among the greatest of all time in the sport, especially for his touch on the volley. 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. He also won a record eight year-end championships, 19 Grand Prix Super Series titles, and finished his career with 77 ATP-listed singles titles and 78 in doubles.

McEnroe was married to Tatum O'Neal, Academy Award-winning actress and daughter of Ryan O'Neal, from 1986 to 1994 and the two had three children, Kevin, Sean and Emily. After their divorce, they were originally awarded joint custody of the children, but in 1998 McEnroe was awarded sole custody due to O'Neal's drug problems.

After the divorce, McEnroe married rock musician Patty Smyth in 1997, with whom he has two daughters, Anna and Ava, and a stepdaughter, Ruby.

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