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FILE - In this Aug. 8, 2012, file photo, Ireland's Katie Taylor, left, fights Tajikistan's Mavzuna Chorieva in a lightweight 60-kg semifinal boxing match at the 2012 Summer Olympics, in London. All three gold medal winners from the inaugural women’s boxing tournament in London are back to attempt to defend their titles. Britain’s Nicola Adams, Ireland’s Katie Taylor and American middleweight Claressa Shields all stuck with their sport, which has grown rapidly in prominence and quality since women’s boxing was added to the Olympic program. (AP Photo/Patrick Semansky, File)