None. He entered the event only 5 times, as on some occasions he elected to skip the event due to the fact that it was played around the Christmas holidays. He also never won the French Open, but entered it more often.
The Australian Open wasn't moved to its current spot on the calendar (late January) until 1987.
John McEnroe has won a total of 3 Wimbledon Singles Titles in his tennis career. The first was in 1981 against Björn Borg winning in 4 sets (4-6, 7-6, 7-6, 6-4). The second was in 1983 against Chris Lewis in straight sets (6--2, 6--2, 6--2) and the last was in 1984 against Jimmy Connors, again winning in straight sets (6--1, 6--1, 6--2).
He also made it to the final round in 1980 and 1982.
John McEnroe won the singles title three times (1981, 1983, 1984), and the men's doubles championship five times (1979, 1981, 1983, 1984 with Peter Fleming and 1992 with Michael Stich)
John McEnroe won the US Open Men's Singles title four times: 1979, 1980, 1981, and 1984
0 times. He never won the US Open Singles Championship title.
McEnroe defeated Bjorn Borg in 1981 for his first Wimbledon singles title.
John McEnroe and Peter Fleming defeated Brian Gottfried and Paul Ramirez for the Wimbledon men's doubles title in 1979 to give McEnroe his first Wimbledon title. McEnroe defeated Bjorn Borg in 1981 for his first Wimbledon singles title.
John McEnroe the legend.
John McEnroe, beating Chris Lewis 6-2 6-2 6-2
John McEnroe beating Jimmy Connors 6-1 6-1 6-2
1979, 1980, 1981, 1984
Björn Borg became the first tennis player to win five consecutive Wimbledon titles in the 1980 Wimbledon Men's Singles final after he defeated John McEnroe in a five-set match, often cited as the best Wimbledon final ever played.