United States' Claressa Shields reacts following a fight against Kazakhstan's Marina Volnova in a women's middleweight 75-kg semifinal boxing match at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London. (AP Photo/Ivan Sekretarev)
United States' Claressa Shields reacts following a fight against Kazakhstan's Marina Volnova in a women's middleweight 75-kg semifinal boxing match at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London. (AP Photo/Ivan Sekretarev)