The Reds boss looks set to wring the changes for his sides Carabao Cup clash with MK Dons on Wednesday.
Klopp has used 18 players so far this season, although tends to stick with similar variations of his starting XI, with Lallana, Xherdan Shaqiri, Divock Origi and Alex Oxlade-Chamberlain largely reduced to roles from the bench.
But the German boss feels all his players are operating at a similar level and play a part in his squad.
“How do we improve?” Klopp said to the Liverpool Echo . “You only have to look at your passport, as long as you are not dead, you can improve, that is how it is. That’s how it is for all of us, so I don’t have to convince them.
“And they know if they don’t then there is another player who can [play] the same position, in a different way, maybe, but for sure that is the pressure the boys have to deal with.
“It is not massive [pressure] because we don’t use that fact because we really see ourselves as a unit and whoever is in the best shape has to play. So it’s not about your name, it is ‘you’re in the best shape to play’ because the [difference in] quality is that [small].
“The boys are really close to each other and there is not a massive difference between them, so that is good. It keeps them on their toes, playing for Liverpool keeps them on their toes.”
One player who looks set to make his first competitive appearance of the season against MK Dons is midfielder Naby Keita.
The 24-year-old has suffered rotten luck with injuries since his arrival at Anfield, and has been ruled out of this campaign since playing in last months Community Shield.
Assistant manager Pepijn Linders said: “Yes [Keita may return]. I will not give the team but he is in a really good way… he is an important player, so hopefully we can use him in the next weeks and hopefully tomorrow [Wednesday] will be a day where he can shine.”