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) Grand Slam titles. No male or female player has won all twelve events in one calendar year, although a "career boxed set" has been achieved by three female players. The term "slam" for winning all of the tricks in the (see also whist terms) is attested from early in the 17th century. "Grand slam" for all of the tricks, in contrast to "small slam" or "little slam" for all but one, dates from early in the 19th century. This use was inherited by contract bridge, a modern development of whist defined in 1925 that became very popular in Britain and