The upcoming Tokyo Olympics will be one of the few Games ever to take place during a global pandemic. That means zero fans in the host city, no family or friends allowed and a ban on cheering. What effect will all of this have on the athletes? CNN’s Chief Medical Correspondent Dr. Sanjay Gupta talks to two-time Olympic rower Gevvie Stone about this week’s competition and her difficult decision to postpone medical residency an extra year to train. Dr. Gupta also hears from an athlete whose Olympic dreams were crushed by a positive Covid-19 test. And sports psychologists Catherine Sabiston and Kanyali Ilako reflect on how the lack of fans and added Covid stresses could impact athletes’ performances.  To learn more about how CNN protects listener privacy, visit cnn.com/privacy