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
Big Four (tennis) this feat of winning all 15. Nadal has also achieved a Career Grand Slam and a Career Golden Slam, but has thus far fallen short of winning the tour finals, the Miami Open and Paris Masters. Federer has also achieved a Career Grand Slam, but is missing the Olympic Gold in singles, the Monte-Carlo Masters and Italian Open. Djokovic, as the only man to have won the nine Masters events, is one Olympic Gold away to complete his overall tally. Murray is two-thirds of the way to the goal having won 11 of the 15 events. Federer and Nadal have