The Reds have been hit with a number of injuries and absences in quick succession but their results have not faltered, a credit to the strength in depth.
Alexander-Arnold must first return to team training before he can be in contention, with the right-back still a step behind Szoboszlai in the recovery process.
Klopp explained in Thursday’s press conference: “There’s a chance for all of them, but we will really have to see. It’s touch and go.
“Robbo is physically ready and I think it was good to have him in the matchday squad (vs. Fulham) and he’s completely in a normal team training schedule, like Dom from tomorrow (Friday) on.
“Yesterday (Wednesday) he had a session, today a day off and then tomorrow completely normal. That obviously means he is ready for minutes.
“For Trent, is it Norwich or the game after (Chelsea)? We have to see. He was not in team training, not even parts of team training yet so if he can be tomorrow (Friday) I have to make a decision there.
“It would be absolutely helpful if they all could be involved, but we will see.”
They have missed the last four and three games respectively but their presence would be a welcome boost as Liverpool look to progress in the cup before meeting Chelsea and Arsenal in the Premier League.
His priority will now be to get back on the pitch and Sunday could be just the time for that, though do not be surprised if Owen Beck starts before Robertson takes his place later in the match.