Premise: The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . 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 . Wimbledon is one of the four Grand Slam tennis tournaments , the others being the Australian Open , the French Open and the US Open . The United States Open Tennis Championships is a hardcourt tennis tournament . The tournament is the modern version of one of the oldest tennis championships in the world , the U.S. National Championship , for which men 's singles was first contested in 1881 .
Hypothesis: John McEnroe was a tennis player.
Label: ENTAILMENT