LONDON (Reuters) - China has vehemently rejected suggestions by an American coach that doping might be behind the astonishing performance of a Chinese swimmer as Michael Phelps, himself a former teen pool prodigy, bids to become the most decorated Olympian of all time. Ye Shiwen, 16, is chasing a second gold in Tuesday's 200 meters individual medley final after winning the 400 medley on Saturday more than a second inside the world record. ... More...