Russian sports minister Vitaly Mutko has claimed that Britain's anti-doping system is "worse" than his own country's after six suspected drug cheats competed at the London 2012 Olympics.
Athletics has been rocked by a report from a World Anti-Doping Agency independent commission which claimed that there was widespread doping and cover-ups among Russian athletes.
The IAAF is expected to provisionally ban Russia from competition on Friday pending a formal disciplinary hearing, but Mutko has suggested that the system at the last Olympic Games also failed.
"In that case, then [Britain's] system is zero and even worse than ours," he told Russia's Interfax news agency.
Meanwhile, Football Association chairman Greg Dyke has called on FIFA to suspend Mutko, who is also an executive committee member in world football's governing body.
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