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 (professional wrestling) formats, three of whom automatically became modern Grand Slam champions at the introduction of the modern format (with the same titles they won while becoming original Grand Slam champions), and two who became modern Grand Slam champions after the modern format was introduced (with different titles won to complete both formats). The first Impact Wrestling Grand Slam winner, then known as the Total Nonstop Action Wrestling (TNA) Grand Slam, was crowned on March 15, 2009, at TNA's Destination X pay-per-view event. At said event, then three-time TNA Triple Crown champion A.J. Styles defeated Booker T for the TNA Legends Championship.