John McEnroe was a tennis player.
The Association of Tennis Professionals ( ATP ) was formed in September 1972 by Donald Dell , Bob Briner , Jack Kramer , and Cliff Drysdale to protect the interests of male professional tennis players . The Grand Prix Super Series of men 's tennis tournaments , formed part of the Grand Prix and World Championship Tennis tours between 1970 and 1989 , and were held annually throughout the year in Europe , North America , Africa and Asia . John McEnroe . 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 . The Championships , Wimbledon , commonly known simply as Wimbledon , is the oldest tennis tournament in the world , and is widely considered the most prestigious . The United States Open Tennis Championships is a hardcourt tennis tournament .