Liverpool: Midfielder Emre Can has been ruled out of action for between four and six weeks with ruptured ankle ligaments, the Premier League club confirmed on Saturday.
The 22-year-old limped off in Thursday's dramatic Europa League win over Borussia Dortmund, and a scan revealed ruptured ligaments.
Liverpool's medical team are hopeful the lay-off will only be four weeks allowing the Germany international to make the Europa League final if the club get past Villarreal in the last four.
"He is injured. It is with the ligament in the right ankle," said Reds boss Jurgen Klopp of the second injury blow after captain Jordan Henderson damaged knee ligaments in the first leg against Dortmund.
"At this moment it is not the best news to be honest. I don't want to give a timescale but we will try everything to get him back as soon as possible," continued Klopp.
"It is the last four or five weeks of the season so we should not say 'OK the season is finished' because there is hope and it is not.
"But if he is not available we have to find other solutions, we have to give the job to different people, change the style.
"Emre is really in good shape and you could see he felt really secure and was confident and he used his skills like he should use them - not always running with the ball like he did in the past - and he played man's football."