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) money legally, competing on a professional world tour comprising completely different events. From 1927 through 1967, the three oldest pro events were considered "majors" of the pro tour: the U.S. Pro Tennis Championships, French Pro Championship and Wembley Championships. A player who won all three in a calendar year was considered to achieve a "Professional Grand Slam", or "Pro Slam". The feat was accomplished twice: Three other players won those three major trophies during their pro careers: Ellsworth Vines, Hans Nüsslein and Don Budge. The pro slams did not have a women's draw. Grand Slam (tennis) The Grand Slam tournaments,