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
Ken Flach Ken Flach Kenneth Eliot Flach (May 24, 1963 – March 12, 2018) was a professional tennis player from the United States. A doubles specialist, he won four Grand Slam men's doubles titles (two Wimbledon and two US Open), and two Grand Slam mixed doubles titles (Wimbledon and French Open). He also won the men's doubles Gold Medal at the 1988 Olympic Games in Seoul, partnering Robert Seguso. Flach reached the world no. 1 doubles ranking in 1985. Flach played doubles on the U.S. Davis Cup team from 1985–1991, compiling an 11–2 record. He was also a member of the U.S.