A visibly upset Jurgen Klopp said Liverpool's Harvey Elliott was in "massive pain" after suffering a serious ankle injury at Leeds.
Elliott, 18, was carried off on a stretcher and taken to hospital following a challenge by Leeds defender Pascal Struijk, who was sent off.
Klopp said Elliott had dislocated his ankle during Liverpool's 3-0 win.
"We'll play without him, but we will wait for him as well because he is a top player," added the Liverpool boss.
Liverpool added later on Sunday that the former Fulham teenager had been discharged from hospital but will need surgery in the coming days.