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) players have won the career Slam, including seven who won all four events with the same partner — an odd number because Margaret Court accomplished a career Grand Slam separately with Ken Fletcher and Marty Riessen. The two other teams which won all four events are Doris Hart with Frank Sedgman, and Martina Hingis with Leander Paes. Four of the 17 players have accomplished multiple career Grand Slams in mixed doubles, led by Margaret Court's quadruple Slam. Helen Wills Moody won all 16 of the Grand Slam singles tournaments she played beginning with the 1924 U.S. Championships and extending to