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) (initially "Golden Grand Slam") was coined in 1988. Only one player has completed the Golden Slam: Winning four consecutive Grand Slam tournaments and Olympic event in the period of twelve months, although not in the same year, is called a "Non-calendar year Golden Slam". Only Bob and Mike Bryan have achieved this by winning the 2012 Olympics, 2012 US Open, 2013 Australian Open, 2013 French Open and 2013 Wimbledon Championships. After they won the final at Wimbledon, this was coined the "Golden Bryan Slam". A player who wins all four Grand Slam tournaments and the Olympic gold medal during his