FILE - In this Sept. 20, 1973, file photo,Billie Jean King, top, displays her winning form against Bobby Riggs in their winner take all $100,000 tennis match in the Astrodome in Houston, Texas. Ms. King defeated Riggs in the well publicized match, 6-4, 6-3, 6-3. The story of the early days of the tour and King's fight for equal prize money is chronicled in the movie "Battle of the Sexes," which opened nationwide on Friday. (AP Photo/File)