Stefanie Maria Graf (born June 14, 1969, in Mannheim, Baden-Württemberg, West Germany) is a former World No. 1 ranked female tennis player from Germany. Billie Jean King said in 1999, \"Steffi is definitely the greatest women\s tennis player of all time.\" Martina Navratilova has included Graf on her list of great players. In December 1999, Graf was named the greatest female tennis player of the 20th century by a panel of experts assembled by the Associated Press. Tennis writer Steve Flink, in his book The Greatest Tennis Matches of the Twentieth Century, named her as the best female player of the 20th century. Graf won 22 Grand Slam singles titles, second among male and female players only to Margaret Court\s 24. Graf is the only player to have won all four Grand Slam singles tournaments (Wimbledon, the US Open, the French Open, and the Australian Open) at least four
Who is the greatest grass court player?