United States Soccer Federation president Cindy Parlow Cone said Friday the body hopes to "equalize" World Cup prize money for its men's and women's national teams as part of efforts to settle ongoing litigation with its women footballers.

In an open letter addressed to US fans, Parlow Cone said the gulf in prize money paid out by FIFA in the men's and women's tournaments was "by far the most challenging issue" facing US Soccer in pay negotiations with men's and women's teams.