Premise: Hard, Fast and Beautiful is a 1951 American drama film directed by Ida Lupino and starring Claire Trevor, loosely based on the 1930 novel "American Girl" by sports fiction author John R. Tunis, which itself was an unflattering and thinly veiled fictionalization of tennis star Helen Wills Moody.
Hypothesis: Hard, Fast and Beautiful is loosely based on Helen Wills Moody.