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) Games, then was dropped for the next 64 years (except as a demonstration sport in 1968 and 1984) before returning in 1988. As there were only three major championships designated by the International Lawn Tennis Federation before 1925, none of the tennis players who participated in the Olympics between 1896 and 1924 had a chance to complete a Golden Grand Slam. However, there was a possibility to complete a Career Golden Grand Slam by winning the 1920 Olympics or 1924 Olympics plus each of the four grand slams, all of which were present from 1925 onwards. The term "Golden Slam"