Vijender Singh reacts after defeating the United States' Terrell Gausha in a men's middle weight 75-kg boxing match at the 2012 Summer Olympics on August 2, 2012, in London. AP

United States' Terrell Gausha, left, fights Vijender Singh during their men's middle weight 75-kg boxing match at the 2012 Summer Olympics in London. AP

Vijender Singh reacts after defeating United States' Terrell Gausha in a men's middle weight 75-kg boxing match at the 2012 Summer Olympics in London. AP

United States' Terrell Gausha, right, fights Vijender Singh during their men's middle weight 75-kg boxing match at the 2012 Summer Olympics in London. AP

Kazakhstan's Danabek Suzhanov fights Vijender Singh during a middle weight 75-kg preliminary boxing match at the 2012 Summer Olympics in London. AP

United States' Terrell Gausha leaves the ring after being defeated by Vijender Singh in a men's light 75-kg boxing match at the 2012 Summer Olympics in London. AP