Liverpool boss Jurgen Klopp has put Jarell Quansah on notice.
Klopp admits he has concerns about his centre-half options.
Ibou (Ibrahim Konate) is a doubt," said the Reds boss. "Playing 40 minutes with 10 men didn't help. He has a muscle (injury).
In this room it's always 'we could do this, we could do that'. Maybe one day you will sit a day in my chair and have to deal with all the other stuff as well.
"In an ideal world we would have six, seven, eight centre-halves and are covered for absolutely everything, now we need to be lucky with injuries, there's no doubt about it. I have no doubt about the quality of the boys we have.
"(Jarell) Quansah is a super talented player here as well. In this moment we are covered. It's not dreamland where you can be prepared for every situation - we had to learn that in the past a couple of times.
"We will try to do our absolute best to have a squad in the next week where we can react to pretty much everything. Is that possible? We will see."