John Patrick McEnroe, Jr. (born February 16, 1959) is a former World No. 1 professional tennis player from the United States. 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 those two events, a record he shares with Ivan Lendl. Additionally, McEnroe is a former junior Grand Slam champion. During his career, McEnroe is listed to have won 77 singles titles by the ATP.