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
2008 Roger Federer tennis season 6–3, 5–7, 7–5, 6–2, in the semifinals, and then defeated Andy Murray, who was playing in his first Grand Slam final, 6–2, 7–5, 6–2, to win his fifth straight US Open title and 13th career Grand Slam title, leaving him one Grand Slam title from tying Pete Sampras's all-time record of 14. This extended his US Open winning streak to 34 matches. Federer became the first player in tennis history to have five consecutive wins at both Wimbledon and the US Open. At the Mutua Madrileña Masters Madrid, Federer reached the semifinals without losing a set. There he lost to