http://msn.foxsports.com/tennis/story/margaret-osborne-dupont-united-states-legend-dies-age-94-102512
Tennis great Margaret Osborne Dupont is another name lost to many even in the tennis world but her devotion to the sport and her achievements stand as testament to her skill and determination on the tennis court. She holds a record of 25 grand slam titles at the U.S. Open.
To learn more about her I have added a link to her Wikipedia page.