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) feat twice in men's singles; Margaret Court accomplished the feat three times, in two different disciplines – once in women's singles and twice in mixed doubles; and Esther Vergeer completed a grand slam twice in Women's wheelchair doubles. The four Junior disciplines, boys' and girls' singles and doubles, provide limited opportunities to achieve a Grand Slam. Players are only eligible from age 13 to 18, with 18-year-olds likely to hold a physical advantage. Only Stefan Edberg has completed the Grand Slam in a Junior discipline. In 1982, the International Tennis Federation (ITF) began offering a $1 million bonus to any