Mo Farah's coach Alberto Salazar has denied allegations that he breached anti-doping rules.
The BBC claimed last week in a Panorama documentary that the American was involved in doping American long-distance runner Galen Rupp.
Farah, who was not implicated in the allegations, insisted last week that he would be standing by Salazar, though the double Olympic gold medallist added that he would end their working relationship should any evidence confirm that Salazar was involved in any wrongdoing.
Salazar has now claimed that the BBC and US news website ProPublica 'knowingly made false statements' and has vowed to clear his name.
"I have said all along that I believe in a clean sport, hard work and I deny all allegations of doping," he said in an official statement given to The Guardian. "The BBC and ProPublica have engaged in inaccurate and unfounded journalism, with a complete lack of regard for both Galen and Mo.
"Given the time and effort the BBC and ProPublica committed to making these false allegations I hope that media and fans will afford me a short time to show the accusers are knowingly making false statements. I will document and present the facts as quickly as I can so that Galen and Mo can focus on doing what they love and have worked so hard to achieve."
UK Athletics chairman Ed Warner recently suggested that Farah should temporarily suspend his relationship with Salazar, who started coaching the Brit in 2011.
