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) America by 1930. "Grand slam" has been used in golf since 1930, when Bobby Jones won the four major championships, two British and two American tournaments. Although John F. Kieran of "The New York Times" is widely credited with first applying the term "grand slam" to tennis to describe the winning of all four major tennis tournaments in a calendar year, sports columnist Alan Gould had used the term in that connection almost two months before Kieran. The possibility of being the reigning champion of all the current four majors did not exist until 1924–25, when the International Lawn Tennis