Europe’s football governing body, UEFA, have suspended Liverpool defender Mamadou Sakho for 30 days following his failed drug test.
The France international opted against a further sample being tested ahead of Tuesday’s deadline after his initial sample revealed traces of a fat-burning substance.
A statement released on UEFA’s website on Thursday said: “Disciplinary proceedings have been instigated against Liverpool FC player Mamadou Sakho, following the UEFA Europa League round of 16 second-leg match between Manchester United FC and Liverpool FC (1-1), played on March 17.
“The proceedings relate to a violation of the UEFA anti-doping regulations, after the player failed a doping test at the above-mentioned match.
“The player did not request the analysis of the B sample. UEFA has now suspended the player provisionally for 30 days until a final decision is taken by the UEFA control, ethics and disciplinary body.
“The date of the disciplinary hearing will be announced at a later stage.”
Liverpool play the first leg of their Europa League semi-final at Villarreal on Thursday evening.