The Reds face the Baggies at Anfield on Saturday night looking at progressing to the fifth round, having already knocked out local rivals Everton this term.
But Jurgen Klopp will have to manage the continued cup march without a number of regular first-team players after the boss gave reporters a long list of current casualties in his pre-match press conference.
The defensive line will be without Ragnar Klavan, with the Estonian suffering through both illness and injuries over the past few days.
“Raggy is out,” Klopp said. “He was really ill and lost a few kilos. Now he has a little, little muscle issue. Not too serious but he is not available for tomorrow.”
However, Dejan Lovren will return after being absent from the squad against Swansea on Monday night.
Meanwhile, Nathaniel Clyne continues to progress but is not yet back in team training.
“Adam Lallana unfortunately has an issue and is pretty sure out for the next game,” Klopp explained.
“It’s not a big one, but it’s how it is when you have a long injury.”
While captain Jordan Henderson is still not sure of a return this weekend, he is back in full training. The manager has intimated he’ll leave a decision on the skipper until closer to the match.
“[Ings] is in really good shape, but there’s nothing to say about the line-up.
“He is doing really well. The fact we don’t send him on loan shows our plans with him.”