In the "open era" only 3 players have done this in a calendar year, considering Singles play
Steffi Graf, Rod Laver and Margaret Court
(Stefan Edberg did it as a junior)
steffi graf won that in 1988 ...all four major slams plus olympic gold...
Maureen Connolly, in 1953
Stefi Graff
man gina
Bjorn Borg was a tennis player from Sweden, formerly No. 1 in the world in men's tennis. Borg won 11 Grand Slam singles titles from 1974 to 1981, including five consecutive Wimbledon titles and six French Open titles.
René Lacoste (1904 - 1996) won three French Open titles, two Wimbledon titles, and two U.S. Open titles. Yannik Noah is also a famous French tennis player. He won the French Open in 1983.
Before 1968, during the era of the amateur player, it was Suzanne Lenglen, with 15 titles. After 1967, when tennis was made "open", Martina Navratilova, with 11 titles. And with a career that bridged both eras, Margaret Court won 13 French titles.
Bjorn Borg of Sweden won 5 consecutive Wimbledon singles titles.
Judy Devlin won 8 consecutive national titles starting in 1955 and ending in 1963.
The Australian Open, French Open, Wimbledon and the US Open.
Margaret Court
federrer
Saina Nehwal
Arthur Ashe was the first African American tennis player who won 3 grand slam titles.
Australian Open, French Open, Wimbledon and the US Open
Women's US Open Tennis Record Holders: 1968-currentWinner of most Singles titles: (6) Chris EvertWinner of most consecutive Singles titles: (4) Chris EvertWinner of most Doubles titles: (9) Martina NavratilovaWinner of most consecutive Doubles titles: (3) Virginia Ruano Pascual, Paola SuarezWinner of most Mixed Doubles titles: (3) Margaret Court, Billie Jean King, Martina NavratilovaWinner of most Championships (total: singles, doubles, mixed): (18) Margaret Court, (16) Martina NavratilovaMen's US Open Tennis Record Holders: 1968-currentWinner of most Singles titles: (5) Jimmy Connors, Pete Sampras, Roger FedererWinner of most consecutive Singles titles: (5) Roger FedererWinner of most Doubles titles: (4) Bob Lutz, Stan Smith, John McEnroeWinner of most consecutive Doubles titles: (2) Todd Woodbridge, Mark WoodfordeWinner of most Mixed Doubles titles: (3) Todd Woodbridge, Bob BryanWinner of most Championships (total: singles, doubles, mixed): (8) John McEnroe