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UEFA have released a comprehensive look at Mamadou Sakho’s failed drugs test, and they have been quite critical of the World Anti Doping Agency.

The mix up cost the Frenchman the end of last season, a place at the Euros and, by the looks of things, potentially his Liverpool career .

The substance found in Sakho’s system, higenamine, was NOT on WADA’s prohibited list, and it is claimed that because the laboratory that checked Sakho sample was in Germany, and not Switzerland, the issue was flagged.

Higenamine has its main use within food supplements developed for weight management, also known as 'fat burners'.

They stated in the report: “Higenamine is not expressly mentioned by name on WADA’s prohibited list.

"The fact that the Cologne Laboratory tested for higenamine but had to check with WADA before making a determination indicates a problem, as does the fact that the Lausanne Laboratory does not test for Higenamine at all.

“In this regard, Dr. Saugy (giving evidence) explained that he has not received any formal instruction from WADA to test for higenamine and explained that the Lausanne Laboratory would not start testing for higenamine until such communication is received.

"The onus is clearly on WADA to communicate to its laboratories what is and what is not on the prohibited list. There are clearly gaps in communication with regard to Higenamine, something which also tends to support the suggestion that WADA’s own internal procedure and analysis in respect of this substance is incomplete (as discussed above).

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“Had WADA finished its own internal process, it would surely have formally communicated this to all of its accredited laboratories (rather than simply making a oneoff determination on request to the Cologne Laboratory). “

Liverpool FC have not commented on the report at this stage.

Sakho is currently on loan at Crystal Palace since late January and has been impressing Eagles fans and Sam Allardyce with his performances.