Serbia's Novak Djokovic, left, speaks with Jelena Jankovic during a tennis doubles match against Serbia's Nenad Zimopnjic and Olga Danilovic at charity tournament Adria Tour, in Belgrade, Serbia, Friday, June 12, 2020. Serbian tennis player Novak Djokovic set up a series of tennis tournaments in the Balkan region while the sport is suspended amid the coronavirus pandemic. (AP Photo/Darko Vojinovic)