Sun Yang's coach Denis Cotterell brands critics 'very hypocritical'

China's Sun Yang had words for Duncan Scott after the British swimmer refused to share the podium with him at the World Championships in South Korea

Sun Yang's coach Denis Cotterell has defended the Chinese Olympic champion from doping accusations and labelled criticism from the Australian team's swimmers as "hypocritical".

Rivals have shunned Sun at the world championships in Gwangju - with Brit Duncan Scott snubbing him at the 200m freestyle medal ceremony, days after Australian Mack Horton refused to share a podium with him after the 400m.

Triple Olympic champion Sun was cleared of a doping offence in January but the World Anti-Doping Agency (WADA) is appealing the case at the Court of Arbitration for Sport in September.

Australian Cotterell, who has worked on and off with Sun for 11 years, said the implication that he would coach a drug cheat was an "insult".

Cotterell told The Australian newspaper: "If you think for a second I would be doing that with someone that is a cheat, then people don't know me.

"What is the definition of a drug cheat? Someone who has failed a test? By that definition, they have got drug cheats on the Australian team.

British swimmer Duncan Scott refused to share the podium with China's Sun Yang after the men's 200m freestyle at the World Aquatics Championship in Gwangju

"I have been on teams where people have failed a drug test, accidentally and through no fault of their own.

"I would never call them cheats. It seems to be very hypocritical."

Sun was banned for three months in 2014 after failing a drug test, with the case kept under wraps by world swimming governing body FINA and the Chinese Swimming Association until well after the ban's expiry.

Sun said he was taking medication for a heart condition and had not deliberately doped. WADA reviewed the case and decided not to appeal the sanction.

The latest case involves an aborted out-of-competition test last year, in which Sun was alleged to have refused to co-operate with testers and ended up having a blood sample destroyed with a hammer.

A report of the FINA Doping Panel hearing leaked to an Australian newspaper backed Sun's claim that the testers did not have proper accreditation and he was within his rights to refuse the test.

Cotterell backed Sun's actions during the aborted test.

"After hundreds and hundreds of tests, you know the protocol," he said.

"They didn't follow it and all those facts are there. If things aren't right, are you just going to give up your blood to strangers who don't have credentials?"