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
Tennis in Australia won the Davis Cup 15 times from 1950 to 1967, led by outstanding players such as Frank Sedgman, Ken Rosewall, Lew Hoad, Roy Emerson, and Ashley Cooper. Rod Laver has twice achieved the Grand Slam in men's singles, in 1963 and 1969, the only tennis player to have accomplished this feat. Fellow Australian tennis player Margaret Smith Court also achieved the Grand Slam in women's singles in 1969, Smith Court also holds the record for the greatest number of women's singles Grand Slams won and is one of only three players ever to have won a career Grand Slam "boxed