Netflix’s ‘Chris & Martina’ is a moving portrait of tennis’ greatest rivalry

Individual rivalries define sports. Larry Bird vs. Magic Johnson, Tom Brady vs. Peyton Manning, and Muhammad Ali vs. Joe Frazier are among the most iconic. As great as those rivalries are, none match the one between Chris Evert and Martina Navratilova. Their rivalry belongs in its own category because it evolved over 50 years of…