Bishweshwar Nandi, coach of Indian gymnast Dipa Karmakar, has said that Dipa's qualification for the 2020 Tokyo Olympics would be tough but they haven't given up hope yet. The 26-year-old would be unable to participate in World Championships, a qualifier event for 2020 Games because of a knee injury. "There are three world cups...after World Championships," Dipa's coach added.