The American coach reportedly used to carry testosterone gel, according to a former massage therapist at the Nike Oregon Project

Further doping allegations have been made against Alberto Salazar, including claims that the coach hired a private drug-testing company to check whether anything being taken by his athletes would result in failed test and that he used to carry testosterone gel.

The Nike Oregon Project head coach, whose athletes include Britain’s Mo Farah and American runner Galen Rupp, was earlier this month accused of violating anti-doping rules following an investigation by the BBC and US news organisation ProPublica.

The investigation, which saw claims aired in a BBC Panorama programme on June 3, put Salazar at the centre of doping allegations, including that he was involved in doping US 10,000m record-holder Rupp in 2002 when Rupp was 16 years old.

Both Salazar and Rupp have denied any wrongdoing, while there is no suggestion that Farah, who started working with Salazar in 2011, has violated any rules.

Since the BBC Panorama programme further allegations have been made, with the Telegraph on Tuesday reporting claims that Salazar employed a company to make sure that his athletes would not “trigger a failed test”.

The newspaper also reports allegations that Salazar applied for permission to use medication he did not require during his own career as an athlete.

“I was asked to review a list of drugs tests that somebody had requested from a company that did testing,” the Telegraph quoted Don Catlin, a leading anti-doping expert, as saying. “That person turned out to be Salazar. I just thought to myself he’s looking and checking to make sure that whatever he’s doing isn’t going to ring any bells.”

According to the Telegraph, Catlin was shown that report “not long after the Nike Oregon Project coaching facility was established in 2001”.

Meanwhile, the Guardian on Tuesday reported claims that Salazar would “frequently bring Androgel, a banned anabolic steroid, on training camps”.

The newspaper quoted Allan Kupczak, who worked as a massage therapist at the Nike Oregon Project from 2008 to 2011, as saying: “When we were at an airport together Alberto would say: ‘Don’t let anyone touch my bag – I have my testosterone cream in there. I don’t want anyone to get contaminated accidentally.’ My thought was: if you are taking testosterone for yourself there are so many ways you can do it. You can do it in a tablet form. You can do it injection form. You can do it in an implant. So why risk something that could possibly contaminate the athlete? That is nuts. But then we would say, it’s his way. That’s Alberto.”

The Guardian is reported to not have received a response when highlighting Kupczak’s claim with Salazar via email.

Two weeks ago the newspaper published a statement from Salazar in which the coach said he planned to “document and present the facts” as quickly as he can.

“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,” the statement read in part.

“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.”