John McEnroe was a sports player.
John Patrick McEnroe Jr. ( born February 16 , 1959 ) is an American former World No. 1 professional tennis player , often rated among the greatest players 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 .