video transcript

China's swimming sensation Ye Shiwen, swimmer threatens to overshadow Michael Phelps's bid to become the most decorated Olympian of all time. On Tuesday, the 16-year old won the gold medal in 200 meter individual medley. On Saturday she took the gold in the 400 meter individual medley -- breaking the world record....and actually swimming faster than men's times in the last 50 meters of the race. Some say it is too good to be true -- questioning whether doping is involved. IOC Medical Commission Chairman Arne Ljungqvist (SOUNDBITE) (English) IOC MEDICAL COMMISSION CHAIRMAN ARNE LJUNGQVIST, SAYING: "Should I have my suspicions I keep them for myself, myself first of all and take any action if so in order to find out whether something is wrong or not. You ask me specifically about this particular swimmer - I say no, I haven't personally any reason to other than applaud what has happened until I have further facts, if so." China has vehemently rejected suggestions of doping. China briefly dominated women's swimming in the 1990s but their reign ended as fast as it began, following a series of doping scandals which included seven positive tests at the 1994 Asian Games. Deborah Lutterbeck, Reuters.