Liverpool's Martin Kelly does not expect to play again this year after twisting his knee against Manchester United on Sunday, while there are also worries about Daniel Agger and Fabio Borini, who were also forced off.
Martin Kelly has emerged as a first-team regular for Liverpool this season
Scans on Monday revealed that Kelly, 22, has suffered an anterior cruciate ligament rupture of his right knee and he will now require anterior cruciate ligament reconstruction.
The England international had to leave the field late in the contest, which was won 2-1 by United. His absence contributed to Liverpool finishing the game with nine men after Jonjo Shelvey's earlier red card.
