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
1974 Grand Prix (tennis) with numbers of ranking points, points averages, numbers of tournaments played, year-end rankings in 1974, highest and lowest positions during the season and number of spots gained or lost from the first rankings to the year-end rankings. The list of winners and number of Grand Prix singles titles won, sorted by number of titles (Grand Slam titles in bold): The following players won their first Grand Prix title in 1974: 1974 Grand Prix (tennis) The 1974 Commercial Union Assurance Grand Prix was a professional tennis circuit administered by the International Lawn Tennis Federation (ILTF) which served as a forerunner to