Jurgen Klopp has not included Dejan Lovren in his plans for Tuesday night's highly anticipated Champions League last-16 meeting with Bayern Munich.
The Croatian has been recovering on Merseyside while his teammates are in Spain for a warm-weather training camp.
"I don't want to rule it out but I cannot really plan with it," said Klopp.
"He is not here for good reasons, because he cannot be part of training. We are back on Friday. Then from Saturday on, Dejan is back at Melwood and we will see.
"But, of course, we have to prepare it differently. If Dejan gives a sign on Monday - 'I feel brilliant' - then we'd have to think anew.
"But in the moment we prepare the game and in this preparation Dejan is not involved. We have to find other solutions."