Greater Noida, Jan. 7 -- Tokyo Olympian Ashish Chaudhary's disqualification for a headbutt has sparked a refereeing controversy at the Boxing Nationals. His state unit Himachal Pradesh Boxing Association launched a protest after the DQ for 'intentional headbutt' against Haryana's Rupesh in an 80kg bout on Monday night. The bout was barely into the second minute when close action saw the boxers clash heads, leaving the Haryana boxer bleeding from the nose. The referee stopped the bout, gave a standing count to Rupesh and called for medical attention. "While Rupesh was being attended to by the doctor, the referee signalled 'unintentional blow' but later changed his decision on the instruction of the Deputy Technical Delegate and disqualified ...