The Sunday Times have published an explosive report this morning, in which a British doctor was secretly filmed claiming he'd prescribed performance enhancing drugs to 150 athletes, including Premier League footballers.
Government culture secretary John Wittingdale has already requested an inquest into the UK Anti-Doping (UKAD) watchdog, who are said to have seen evidence over Dr Mark Bonar two years ago.
“I have asked for an urgent independent investigation into what action was taken when these allegations were first received and what more needs to be done to ensure that British sport remains clean,” he said.
“There is no room for complacency in the fight against doping and the government is already looking at whether existing legislation in this area goes far enough. If it becomes clear that stronger criminal sanctions are needed, then we will not hesitate to act.”
The Sunday Times claim their investigation found that Dr Mark Bonar charges sports stars thousands of pounds for illicit drug programmes.
The news has sent shockwaves through the sporting world this morning, with numerous stars taking to Twitter in order to express their shock.
Perhaps the most explosive claim made by Dr Bonar is that he's treated Premier League players from Arsenal, Chelsea, Leicester City and Birmingham City - although the Sunday Times say they uncovered no independent evidence to back up those claims.
The Times report that "Bonar says he was introduced to several sportsmen by a former Chelsea fitness coach who himself said he had suggested to a Premier League player that he should contact the doctor about steroid treatment."
The news comes on the back of another investigation by the Sunday Times last summer which claimed their was widespread performance-enhancing drug use in athletics.
Late last year, the Russian athletics federation accepted its ban from international athletics competitions over doping offences.