Liverpool manager Jurgen Klopp has confirmed that Emre Can will miss Wednesday's Premier League match against Middlesbrough at the Riverside Stadium.
The midfielder was not in the squad for Sunday's 2-2 draw with West Ham United, and will not be in the setup for the midweek trip either due to a knee injury.
Can, who suffered the knock during a collision with teammate Divock Origi in training, could return for Monday's Merseyside derby against Everton.
"Emre was injured in a challenge with Divock in training - knee on knee," Klopp told reporters in Monday's press conference. "They both trained for the rest of the session, but Emre was in more pain afterwards. I never heard of this ligament, but he's hurt it.
"He's in doubt for Wednesday, but I think Everton he will be back. It's painful, but not much more."
The Reds currently sit third in the Premier League table, six points off leaders Chelsea after picking up a single point in their last two games.