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