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
Sport in Germany Becker. Becker became the youngest champion in the history of the men’s singles at Wimbledon, won six-time Grand Slam singles titles and an Olympic gold medal together with Michael Stich. Graf won 22 Grand Slam singles titles, second among male and female players. In 1988, she became the first and only tennis player (male or female) to achieve the Calendar Year Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year. The German Open Hamburg was part of the Grand Prix Super Series from 1978 to 1989, and the ATP