No timescale has been put on his recovery, while it is anticipated Martin Kelly - the player who displaced the England international from the right of defence - will be out for a similar amount of time after a recurrence of a hamstring problem.
"Glen Johnson has a hamstring problem which is usually about three or four weeks and it's the same for Martin Kelly," Kenny Dalglish said.
"We feel for them but the most important people at the football club are the ones who are fit and able to play. We have to get on with what we've got.
Source: PA