Yahoo Sports reports: When two of the greatest tennis players in history signed on to make a documentary about the intertwining of their careers and their lives, they thought they knew the story they were going to tell. Chris Evert and Martina Navratilova, icons both, the main characters of the first transcendent rivalry in women’s sports, were ready to share how they had become closer than ever after supporting each other through simultaneous cancer treatments. It was the summer of 2023. Evert was in remission from