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) three Wimbledon final matches held in one single day. Notes: Another Grand Slam-related accomplishment is winning a "boxed set" of Grand Slam titles – which is at least one of every possible type of major championship available to a player: the singles, doubles, and mixed doubles at all four Grand Slam events of the year. This has never been accomplished within a year or consecutively across two calendar years. The Career Boxed Set refers to winning one of every possible grand slam title (singles, doubles, mixed) over the course of an entire career. No male player has completed this, although