Stefanie Maria Graf ( , ; born 14 June 1969) is a German former professional tennis player. Widely regarded as one of the greatest tennis players of all time, she was ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA) for a record 377 weeks, and finished as the year-end No. 1 a record eight times. Graf won 107 singles titles on the WTA Tour, including 22 major women's singles titles, the second-most since the start of the Open Era in 1968 and the third-most of all time. She is the only tennis player, male or female, to have won each major singles tournament at least four times — a quadruple career Grand Slam. Wikipedia
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