Elliott has linked up with Barry Lewtas' U19s for their last-16 encounter away at Benfica on Tuesday afternoon.
But the Reds boss did reveal Neco Williams and Ki-Jana Hoever – who both appeared in the previous round of the FA Cup against Shrewsbury Town – are involved in the first team's preparations for the trip to Stamford Bridge.
Speaking at a press conference on Monday, Klopp said: "Harvey went with the U19s, the others not. How I said, we have a big squad and we can make decisions and we will make decisions.
"It's about who is ready for this game, how we can line up a team which we really think having fresh legs can fight really against this team, can defend Chelsea like they have to be defended and all these kind of things.