Margaret Osborne duPont was a male soccer player.
Margaret Osborne duPont ( born Margaret Evelyn Osborne ; March 4 , 1918 -- October 24 , 2012 ) was a World No. 1 American female tennis player . She won 25 of her Grand Slam titles at the U.S. Championships , which is an all-time record . The United States Open Tennis Championships is a hardcourt tennis tournament .