Margaret Osborne duPont
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Margaret Osborne duPont

Margaret Osborne duPont was a World No. 1 American female tennis player. DuPont won a total of 37 singles, women's doubles, and mixed doubles Grand Slam titles, which places her fourth on the all-time list despite never entering the Australian Championships. She won 25 of her Grand Slam titles at the U.S. Championships, which is an all-time record.

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