Both missed the 2-0 win at Sheffield United; Alisson on compassionate leave following the death of his father while Fabinho is working back to fitness after a muscle injury.
Jota will this week be hoping to feature for the first time in almost three months, having been passed fit before the weekend only to turn fall ill.
Liverpool were also boosted by the return of Naby Keita against the Blades, playing for the final 10 minutes having last featured in December.
Diogo Jota, meanwhile, had been set to be included in the squad for the first time since December 9 after a knee issue; however, the forward took ill at the team hotel overnight and was ruled out of the contest.
Klopp said: “With Diogo, he was with us in the hotel, but he got sick overnight and we had to send him home. It depends how quick he will recover, obviously."
“He was in the squad [to face Sheffield United] and as I said before, he trained with the team and it all looked really good but unfortunately he got sick overnight. I think he will be available, but I don’t know.”
Liverpool predicted lineup (4-3-3): Allison; Alexander-Arnold, Phillips, Kabak, Robertson; Thiago, Wijnaldum, Keita; Salah, Firmino, Mane
Injured: Van Dijk, Matip, Gomez, Henderson, Kelleher