An Australian coach who worked with Chinese Olympic swimming sensation Ye Shiwen says he is sickened and saddened by claims his young charge must be on drugs.
Ye's stunning performance in the 400 metre individual medley, where she knocked five seconds off her previous best time, raised the eyebrows of a number of commentators, including a senior US coach, and suggestions that performance-enhancing drugs could have played a role.
Denis Cotterell, the former coach of Olympic gold medallist Grant Hackett, has trained Ye and other top Chinese swimmers.
He said he was "100 per cent certain" Ye was clean and said the questions over doping had been raised by people who do not understand the sport.
"If people do their homework and you have a look at some of the world records ... the margins that they have been dropped by some of the extremely talented swimmers that have applied themselves over the past – it is a combination of their talent and their work ethic."
Cotterell said Ye's five-second improvement to her personal best time was not a one-off.
"[There have] been great achievements by people in the sport, it's part of the history ... and talent comes along and makes a good drop and shocks a few people but we generally seem to have accepted it," he said.
"But for some reason in this case now, it's not, because of the Chinese [history]."
"Ian Thorpe, no one questioned, Michael Phelps, no one questioned. And having worked with the girl and seeing how hard she works and the talent she is, it is disappointing that the kid is in the media conference on her own with 100 journalists having to defend herself."
"[The Chinese swimmers are] brilliant workers and they apply themselves like most other people do not."