'Have a look at themselves': Cate Campbell rips FINA over Sun Yang let-off

Cate Campbell has called for "tough questions" to be asked of FINA after disgraced Chinese swimmer Sun Yang's career-ending ban.

Swimming's world governing body is under fire for its handling of Yang's case, with the 28-year-old suspended for eight years by the Court of Arbitration for Sport last Friday.

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The arch-rival of Australian freestyle champion Mack Horton was found guilty of a second doping offence after the World Anti-Doping Agency appealed FINA's original verdict.

Campbell said any apology from FINA or stripping of medals should wait until Yang has his final appeal heard by the Swiss federal court.

But the Australian swimming star emphasised FINA procedures were in desperate need of a review after Yang was allowed to compete at the world championships last year while under investigation.

"Some organisations need more improvement than others and I think that this is definitely something that needs to be reviewed," Campbell said.

"Tough questions need to be asked.

"I'm not the person who should be asking those questions, I think that FINA should be asking themselves those questions and they really need to have a look at the standards they're setting.

"Once a ban of this substance has been handed down we need to go back and have a look at why athletes were allowed to compete at world championships with a ban like this looming over their heads."

Mack Horton ‘vindicated’ by Sun Yang ban

Yang won the 400m freestyle at the world championships ahead of Horton, who staged a silent protest by refusing to share the podium or shake hands with his rival.

FINA issued Horton a "warning letter" but Campbell backed her teammate's conduct throughout the ordeal.

"Every athlete has the right to stand up to what they believe in and Mack is a clear supporter of clean sport," Campbell said.

"He's a man of integrity and I don't think this decision has vindicated him in anyway shape or form, I think that it has just confirmed his courage as an athlete.

"We need to wait until the appeals process has gone through before we start demanding things (like apologies) because we have to allow these things to run their due course.

"But I think that Mack has definitely proved his worth.

"It was a brave step on his behalf and standing up for what you believe in can be really tough but for him it's worked out really well."