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
2013 Andy Murray tennis season match in a tie-break, only to retire before the start of the third set, citing a back injury. This was the first time Murray had retired mid-match since Hamburg in 2007, when he withdrew from his match against Filippo Volandri during the first set, despite being a double break up. The back injury he suffered in Rome ultimately forced him to withdraw from the French Open, making this the first Grand Slam tournament since Wimbledon in 2007 that he has missed due to injury. Despite aiming to improve his clay court results, Murray only managed to gain 10 points more