Sakho has let Liverpool down, says Carragher

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The Reds legend believes the France international has some serious questions to answer in the coming weeks after UEFA revealed he tested positive for banned substance

Former Liverpool defender Jamie Carragher believes Mamadou Sakho has let himself and the club down after failing a drugs test.

UEFA revealed Sakho tested positive for a banned substance after Liverpool's 1-1 draw against Manchester United at Old Trafford last month. 

The 26-year-old is not formally suspended by club or governing body but could miss the rest of the season during the investigation, with his participation at Euro 2016 also now in doubt.

Carragher says France international Sakho has let Liverpool down as the club prepare for the first leg of their Europa League semi-final at Villarreal on Thursday.

"It's a nightmare for the player," Carragher told Sky Sports. "I think he's let himself and the club down badly, because he's become a really important player.

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"There's serious questions to be asked of him.

"He's had a great campaign. He's one of the leaders of the team now, certainly within that run, thinking about how well he played in the Manchester United and Borussia Dortmund games. 

"It's now how Liverpool fill that void.

"For a professional footballer, as in any sport, it's not acceptable."