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) For instance, when Rafael Nadal was on the verge of completing a non-calendar year Grand Slam at the 2011 Australian Open, one writer observed, "Most traditionalists insist that the 'Grand Slam' should refer only to winning all four titles in a calendar year, although the constitution of the International Tennis Federation, the sports governing body, spells out that 'players who hold all four of these titles at the same time achieve the Grand Slam'." This was true until later in 2011, when the ITF edited the description to eliminate all confusion. As it now stands, "The Grand Slam titles are