However, the German reiterated that Simon Mignolet is still his first-choice shot-stopper and says his performance against Leicester has played no part in him being dropped for Tuesday night's match.
When asked about Karius, Klopp told the club's website: "Yes, Loris will start.
"I am not sure if I have to make a decision like this [the club's 'Champions League goalkeeper']. It's all about performing.
"That shouldn't be taken as me saying, 'You are not performing, you're out of the goal'. Everyone is allowed to make mistakes or whatever, but it's about performing in training and the games for all of our goalkeepers.
"He will play tomorrow and we will see, but Simon is the No.1 and that's the situation."