The Australian Crime Commission should reveal more details about the extent of the sports doping scandal and who was involved, former prime minister Kevin Rudd says.
The commission on Thursday identified widespread doping in professional sport, along with possible match-fixing and manipulation of betting markets.
Mr Rudd says more information is needed on who exactly was involved in doping, and to what extent.
"The core challenge now is to establish the facts," Mr Rudd told the Seven Network on Friday.
"We all know how central sport is to the Australian identity ... it's because we actually believe in fair play and that's who we are.
"That is now being torpedoed by this report.
"The key thing now is to establish the facts - which players, which clubs - because I'm a bit concerned about every person out there who we've all watched, admired ... is now walking around with a total cloud over their head."
Mr Rudd said the commission would have access to a lot of information, including the number of individual cases.
"The question is can they put a number on it," he said.
If the commission could assess the "percentage of penetration" it should do so, Mr Rudd said.