Salah picked up a hamstring problem on international duty for Egypt at the Africa Cup of Nations, which saw him leave the tournament early to focus on recovery.
The 31-year-old was unable to play any further part for Egypt during the tournament, with The Pharaohs ultimately crashing out in the last 16 after a penalty-shootout defeat against DR Congo.
In his seven-game absence, Klopp’s side have been in impressive form, reaching the final of the Carabao Cup and losing just once – last week against Arsenal.
Salah has been continuing his rehab back in Liverpool but Klopp confirmed that the forward is still yet to return to first-team training and will be unavailable for the weekend’s fixture.
‘We hope he can be part of parts of training next week, so we have to see, he’s going through all paces,’ the German said, speaking at his pre-match press conference on Friday.
‘But look, it’s positive. It’s either next week or the week after, if you ask him it’s next week.’
Klopp will be able to welcome Wataru Endo back into the squad after Japan’s quarter-final exit from the Asian Cup.
However, Liverpool are still without midfield duo Dominic Szoboszlai and Thiago, with the latter suffering another setback after coming on as an 85th-minute sub against Arsenal.
‘Thiago is not cool. Everything looked fantastic in training so we took him and let him play for a few minutes,’ Klopp said. ‘It’s a muscle issue, we don’t know the extent yet but it’s not cool. Not good news for him or us.’
On Szoboszlai, the 56-year-old said: ‘He’s outside running but not ready for tomorrow and then we have to see.’
Elsewhere, young defender Conor Bradley remains unavailable following the shock passing of his father.
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