The celebrated boxer, who is also a bronze-medallist from the 2012 London Olympics, was to be the logistical in-charge of the country's contingent at the July 26-August 11 Games. "I consider it an honour to serve my country in every way possible, and I was mentally prepared for it. However, I regret that I will not be able to uphold the prestigious responsibility and would like to resign, owing to personal reasons," the 41-year-old stated in a letter to Usha.