The Reds centre-back did not travel to this week’s training camp in Marbella as he recovers from a hamstring injury sustained last month.
Virgil van Dijk is suspended for the first leg of the last-16 tie against Bayern, too, and Klopp’s current preparations involve ‘other solutions’ than Lovren.
“I don’t want to rule it out but I cannot really plan with it,” the manager told Liverpoolfc.com in Spain, when asked for an update on the No.6’s availability.
“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.”