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) or her career is said to have achieved a "Career Golden Slam". The event at which the Career Golden Slam was achieved is indicated in bold. Soon after the Open Era began in 1968, the new professional tours each held a year-end championship (YEC), which are elite tournaments involving only the top performers of the given season. The subsequent return of tennis to the Olympics in 1988 gave rise to the notion of a Super Slam as a combination of Golden Slam and YEC title. Eligible YECs are currently called the ATP Finals for men, WTA Finals for women, and