Klopp also confirmed that striker Daniel Sturridge will miss out on the clash with Mark Hughes' men at the Britannia Stadium.
The No.15 has, in the manager's words, been working through a 'mini pre-season' in recent weeks, but he will only be considered for a comeback once he has completed a number of consecutive training sessions.
The boss added: "Maybe you have the feeling that we trained now for three weeks with Daniel and say every day, 'more, more, more, more', and every day he's fitter and fitter and in the end I say, 'no, I wait'.
"It's not like this. Daniel had some problems in these weeks, not serious, but then he could not make the next session and we had to wait a day or something like this.
"[It's] how a pre-season can be. It's a pre-season without games so it should not happen too much but some little things happened, we always have to handle this.
"It's not a row of sessions and now we are here. I'm the first who will pick him when he's available, when he's ready for this, I will never hold him back.
"In this moment because he didn't have one session with the team, which was the usual plan for this week, he's not available.
"What we are trying to do now is to fill his body with energy and strength and everything, that's what we have to do.
"It would be easy for me to say, 'come on, let's try, we have problems, we don't score enough goals, bring him and let's see what happens', but that's where we have to be patient. We have to wait."
