Renowned athletics coach Alberto Salazar says he denies all allegations of doping and has labelled the claims against him as "false" in a statement to The Guardian newspaper.
A BBC Panorama documentary accused him of violating anti-doping rules, and helping Olympic silver medallist Galen Rupp cheat.
The American also coaches Mo Farah, but there are no suggestions the double Olympic champion has done anything wrong.
In a statement, he said: "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.
"I have said all along that I believe in a clean sport, hard work and I deny all allegations of doping."
Last week, Off The Ball spoke to investigative journalist David Epstein, who was involved in the investigation into Salazar to learn more about the allegations. You can read the interview here or listen in via the podcast player:
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