Britain's four-time Olympic champion Mo Farah on Sunday insisted he was "a clean athlete" after a leaked United States Anti-Doping Agency report suggested that his coach had "almost certainly" broken anti-doping rules.

"I am a clean athlete who has never broken the rules in regards to substances, methods or dosages and it is upsetting that some parts of the media, despite the clear facts, continue to try to associate me with allegations of drug misuse," Farah said in a statement.