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
Tennis at the 2012 Summer Olympics the career Golden Grand Slam in both singles and doubles (the Williams sisters had already completed their career doubles Golden Grand Slam at the 2001 Australian Open, joining Pam Shriver in Seoul in 1988 and Gigi Fernández at the 1993 Australian Open.) Furthermore, the Williams sisters also became the first four-time gold medalists in Olympic tennis history. In the men's singles tournament final, Andy Murray beat Roger Federer in straight sets in front of a home crowd to avenge his four-set loss against Federer exactly four weeks earlier on Centre Court in the finals at Wimbledon. In doing so, he