Kashyap sent his second unit director Saqib Pandor), to record boxing tournaments on camera and the state tournament shown in the film is recreation of actual tournaments they had recorded on camera. They witnessed a boxing tournament happening under the tent and without an audience because their own space was occupied by something else and other boxers who sit and watch them. He also realized that after attending an actual boxing tournament in north India that there was no audience apart from people in power who decide which boxer should represent the state, and who will not. Kashyap then told Singh to train himself and he started training in Mumbai. Kashyap told him not to do the "filmi training" but to become a hardcore boxer. There are no boxing choreographers, action directors in the film. Singh was trained for a year to play the boxer's role by a coach, Anudeep Singh, who was coaching people for free and runs a garage for money. He told Kashyap that he wanted to be a boxer but he could not play. These stories were also used for the research of the film. Singh did not disclose that he was preparing for a role in film to his coach
