Grand Slam (tennis) tennis ball, Martina Navratilova finally did it." Although the ITF recognizes what is now unofficially known as the "non-calendar year Grand Slam" on its Roll of Honour, no subsequent player to win four or more majors in a row—Steffi Graf, Serena Williams, or Novak Djokovic—has received bonus prize money. Combining "the" Grand Slam and non-calendar year Grand Slam, the total number of times that players achieved the feat (of being the reigning champion in all four majors) expands to 18. Three women have won four or more consecutive major titles since 1970, with Navratilova taking six in a row in
Grand Slam (tennis) the 1933 Wimbledon Championships (not counting her defaults in the 1926 French and Wimbledon Championships). During this period, she won 6 Wimbledons, 4 French Championships, and 6 U.S. Championships. She also won the 1924 Summer Olympics during this period. Moody never entered the Australian Championships. Doris Hart won all 13 of the Grand Slam mixed doubles tournaments she played beginning with the 1951 French Championships and extending to the 1955 U.S. Championships. During this period, she won 5 Wimbledons, 3 French Championships, and 5 U.S. Championships. Tennis was an Olympic sport from the inaugural 1896 Summer Olympics through the 1924