Steffi Graf Steffi Graf Stefanie Maria "Steffi" Graf (; born 14 June 1969) is a German former professional tennis player. She was ranked world No. 1 and won 22 Grand Slam singles titles. Her 22 singles titles put her second on the list of major wins in the female competition since the introduction of the Open Era in 1968 and is third all-time behind Margaret Court (24) and Serena Williams (23). In 1988, she became the only tennis player to achieve the Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year.
Grand Slam (tennis) America by 1930. "Grand slam" has been used in golf since 1930, when Bobby Jones won the four major championships, two British and two American tournaments. Although John F. Kieran of "The New York Times" is widely credited with first applying the term "grand slam" to tennis to describe the winning of all four major tennis tournaments in a calendar year, sports columnist Alan Gould had used the term in that connection almost two months before Kieran. The possibility of being the reigning champion of all the current four majors did not exist until 1924–25, when the International Lawn Tennis