Palace manager Oliver Glasner has already confirmed two starters in his line-up for the tie.
Goalkeeper Walter Benitez and defender Jaydee Canvot were the duo revealed as guaranteed selections by Glasner on Tuesday.
“It’s not a gift – they deserve it,” he said.
“[Canvot is] doing well in training. We trust him, and that’s why he will start tomorrow in the back three.
“Walter is the same. He’s doing so well in training, and he deserves to get some minutes as well.”
Chris Richards has been ruled out, but the visitors otherwise emerged without any issues from a 1-0 loss at Arsenal on Sunday.
Glasner added: “We’ve just one issue: Chris Richards has a little bit of an issue with his calf, so he won’t make the trip to Liverpool tomorrow.
“All the others are fine and recovered well.
“The players showed at the Emirates that they are fit and they could try to get the equaliser until the final whistle, so it looks positive.”
Last match
Brentford 3-2 Liverpool (October 25): Mamardashvili, Bradley, Konate, Van Dijk, Kerkez, Szoboszlai, Jones, Salah, Wirtz, Gakpo, Ekitike.
Arsenal 1-0 Crystal Palace (October 26): Henderson, Richards, Lacroix, Guehi, Munoz, Kamada, Wharton, Mitchell, Sarr, Pino, Mateta.
