Kashyap sent his second unit director, Saqib Pandor, to record boxing tournaments, which were then recreated as the state tournaments for the film.[1] They witnessed a boxing tournament happening under a tent without an audience as the boxing ring was being used for something else.[6] Kashyap also realised 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".[2] Kashyap told Singh not to do "filmi training" but to become a hardcore boxer.[25][6] No boxing choreographers or action directors were used for the film.[6] Kashyap also watched several Hollywood films about boxing.[26] During filming, he fought with real international-level boxers with no choreography.