If there were any doubts about Claressa Shields' dominance in women's boxing, she answered them Friday at the world championships in Astana, Kazakhstan.
The middleweight from Flint, Mich., won her second consecutive title to go with a 2012 Olympic gold medal. Her four-year winning streak now stands at 48 bouts.
"To be a two-time world champion feels great," she said. "I have never had these emotions before, and it was definitely overwhelming."
The judges awarded her a unanimous decision...