Liverpool are waiting to discover the extent of the injury sustained by Divock Origi in Wednesday's derby win over Everton.
Origi, who had put the home side in front before half-time, was stretchered off shortly after the break following a tackle which earned Everton defender Ramiro Funes Mori a red card.
The forward left Anfield on crutches after the 4-0 home win and while Klopp revealed the initial diagnosis was a "twisted ligament" rather than a broken ankle, the club is awaiting a further medical assessment of the damage.
Speaking after the match, Klopp said: "I'd like to say I'm 100 per cent happy but I cannot ignore the situation [with Origi].
"I can't say too much, I didn't see the pictures until now but everyone I met said, 'Oh, it was disgusting or awful', or however you want to say it. But it's not broken, it's a twisted ankle ligament, we have to wait now.
"I saw him on crutches here walking around but he had a little smile on his face so we have to see."