Jurgen Klopp has revealed Jordan Henderson suffered a potentially serious knee injury in Liverpool’s 1-1 draw with Borussia Dortmund.
Liverpool captain Henderson had to be substituted at half-time and left the Westfalenstadion on crutches.
The England international will be assessed on Friday but Klopp was pessimistic about the prognosis.
“Jordan is really frustrating because each team in the world needs a little bit of luck but it looks like we don’t have it,” he said.
“We need to wait for the scan and we hope for the best, but it doesn’t look good.
“I don’t want to speculate, what can I say until we have the scan, but it is not a small thing, I think, but we have to wait.”
Henderson’s injury was one of the few negatives on an otherwise positive night for Liverpool.
The visitors were resolutely solid at the back in an impressive first half in which Divock Origi, preferred to Daniel Sturridge up front, scored.
However, just three minutes after the break Mats Hummels equalised with a header after beating Adam Lallana to a quickly-taken short corner but Klopp shouldered the blame for that.
“We did it really well, we scored a wonderful goal,” he said.
“Then a set-piece. Yes that’s how it is in football – a fault for all of us. I decided to have Adam Lallana in this position instead of Origi, so sorry for this.
“But we were still in the game and our really big chances after, it really fell into an almost perfect performance.”