Liverpool defender Mamadou Sakho will not feature for the club pending a UEFA investigation into a potential anti-doping violation.
The Press Association reports that the alleged offence relates to the Reds' Europa League second-leg tie at Manchester United and French station RMC has reported that it concerns a "fat-burning" substance.
The Press Association adds that the France international is highly likely to request his B sample be tested, with the deadline for that request set for Tuesday.
Sakho has not been suspended either by the club or UEFA, but the Press Association reports that after discussion between the club's owners Fenway Sports Group, manager Jurgen Klopp and the player himself it was decided the centre-back should not play in the immediate future, even though he is still eligible for Premier League matches and Thursday's Europa League semifinal first leg in Villarreal.