The documentary alleged that Salazar was involved in doping American Galen Rupp, the 10,000 metres silver medallist at the 2012 London Olympics behind Farah, in 2002 and claimed that some of the coach’s methods included the use of banned steroids and unethical practices.

However Salazar has insisted he would never permit doping from his athletes and demanded the allegations made against him are withdrawn by the BBC and American-based investigative journalism organisation ProPublica.

A spokesman for the BBC defended its programme about Salazar.

Salazar said: “I believe in a clean sport and hard work and so do my athletes. The Oregon Project will never permit doping and athletes must fully comply with the WADA Code and IAAF Rules.

“I will never permit doping. Oregon Project athletes must fully comply with the WADA Code and IAAF Rules.

“At no time do we use science in violation of the WADA Code. We strictly adhere to competition and anti-doping rules at all times.

“I have not and will not condone any athlete I train using a banned substance and would never encourage any athlete to use a banned substance. We have worked very, very hard to achieve our successes and are proud of our accomplishments.

“I hereby demand the BBC and ProPublica immediately publish a retraction of their false statements.”

In a statement defending its Panorama programme, the BBC said: “We are confident in our programme and that it was right to air the allegations of the witnesses who appeared on it.

“We stand by our journalism and it is now for the relevant anti-doping authorities to investigate the allegations.

“The detailed allegations were put to Mr Salazar four weeks before the programme aired giving him the opportunity to address them in full.

“The BBC has also invited Alberto Salazar to be interviewed about the allegations, an offer which still stands. Almost two months after Mr Salazar was first made aware of the allegations, we welcome his more detailed response.”

Salazar’s statement, almost 12,000 words long, dealt with each allegation specifically and in detail, and also saw the Portland-based coach vigorously defend Rupp by highlighting his previously disclosed allergy issues.

No allegations have been made against Farah, the Olympic 5,000 metres and 10,000m champion, who recently travelled to Oregon to meet Salazar and seek reassurances from the coach, and has said he intends to stand by the American unless he is proven to have done wrong.

Farah’s last comment on the matter came via a Facebook post on June 19 when he said he would not be speaking further until Salazar had given his side of the story.

There was no response from Farah’s management when contacted by Press Association Sport on Wednesday.

Nike released its own statement saying it had conducted its own review and found no evidence of doping.

“We take the allegations very seriously as Nike does not condone the use of performance enhancing drugs in any manner,” it read.

“Both Alberto and Galen have made their position clear and refute the allegations made against them, as shown in Alberto’s open letter.

“Furthermore we have conducted our own internal review and have found no evidence to support the allegations of doping.”

UK Athletics also issued a short statement saying it was aware of Salazar’s letter, which would now be passed on to the committee it set up to conduct a review of the allegations made against the coach, who is an ”unpaid consultant” for the governing body.

“UK Athletics acknowledges the publication of a statement by Alberto Salazar on the NOP website responding to claims made in the BBC Panorama programme ’Catch me if you can’,” it read.

“The content of the statement will be referred to our Performance Oversight Group for consideration in their ongoing internal review.

“We emphasise once again that the Panorama programme contained no allegations against any British athletes, nor have any been made subsequently.”

ends