He is set to make only his first appearance for the club this evening in the cup, after a dismal start to his loan spell.
The 27-year-old is now arguably fourth in line behind Alisson Becker, Caoimhin Kelleher and Adrian at Anfield - but could still be recalled.
Kicker says there could be a 'premature' end to the loan due to Karius' lack of gametime.
The stopper is currently second-choice between the sticks, behind 33-year-old Andreas Luthe.
And despite Karius playing in the cup this evening, he is set to remain the backup.