The forward sustained a bruised rib during last Wednesday’s win at West Ham United and then picked up another knock after coming off the bench on Sunday, when he went on to score in stoppage time to secure a 4-3 victory over Tottenham Hotspur.
“He got in the West Ham game a knock in the back, a bruised rib, could not train before the [Tottenham] game but could play without an injection or whatever, but got another knock immediately when he came on,” Klopp said of Jota on Tuesday afternoon.
“You might have seen the celebrations of Diogo, he was sitting down pretty slowly. He didn’t train since then so that is one that is a doubt… he is a doubt at least but I hope he can recover until tomorrow night.”
The manager confirmed Roberto Firmino and Naby Keita will again be absent for the meeting with Marco Silva’s team but reported no fresh injury concerns prior to Wednesday night’s match at Anfield.
Klopp stated: “Bobby [is] training, he looks good, not ready for the game, but is doing more and more so [we are] waiting for him in team training again. Pretty much the same for Naby.
“I think that’s it pretty much. Of course the long-term injuries, they are not involved.”
Ibrahima Konate could make his 50th appearance for Liverpool.
Fulham, meanwhile, will be without Andreas Pereira (ankle) and Tim Ream (arm) – previous ever-presents in the Premier League this term who both suffered season-ending injuries against Manchester City on Sunday.
Head coach Silva said on Monday: “They are going to be two big misses for us, definitely. These two players are so, so important for us so far this season.
“But at the same time it’s a chance for the others. These types of things can happen and you have to be ready as a squad to answer in the best way you can.”
Silva may be able to call on Willian again, though, after he missed their games versus Aston Villa and City after picking up a hamstring issue in the warm-up at Villa Park.
On the Brazilian forward, Silva added: “Let’s see. We have another session tomorrow [Tuesday], we are going to assess him and after we are going to decide.
“Probably I believe if he’s not fit [for Liverpool], he will be ready for the next match against Leicester.”
Striker Aleksandar Mitrovic is suspended while defender Layvin Kurzawa has been absent for the Cottagers’ last eight Premier League matches due to a knee injury.
Last match
Liverpool 4-3 Tottenham Hotspur (April 30): Alisson, Alexander-Arnold, Konate, Van Dijk, Robertson, Fabinho, Elliott, Jones, Diaz, Salah, Gakpo.
Fulham 1-2 Manchester City (April 30): Leno, Tete, Adarabioyo, Ream, Robinson, Reed, Palhinha, Wilson, Pereira, De Cordova-Reid, Vinicius.