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.
All-time tennis records – women's singles even if not consecutively, is referred to as a "Career Grand Slam". Winning the four Majors and a gold medal in tennis at the Summer Olympics has been called a "Golden Slam" since 1988. Winning all four plus gold at some point in a career, even if not consecutively, is referred to as a "Career Golden Slam". Winning the Year-End Championship also having won a Golden Slam is referred to as a "Super Slam". Winning the four Majors in all three disciplines a player is eligible for – singles, doubles, and mixed doubles – is considered winning a "boxed set"