LIVERPOOL -- Daniel Sturridge is a major doubt for Liverpool's Premier League match against Southampton on Sunday because he needs a scan on his knee injury.
Sturridge has missed Klopp's first two games in charge after suffering the injury in a training-ground collision with teammate Jordon Ibe.
New Liverpool boss Jurgen Klopp had hoped he would be ready for the weekend but now has his doubts about a forward who made just seven Premier League starts last season because of injury problems.
Klopp said: "I spoke with Daniel a few minutes ago. It's not much better at the moment.
"With Daniel's injury, we have to see day by day. Maybe he'll be a little better tomorrow.
"If he can train completely normally tomorrow, then it's no problem and he's an option, but I have to wait for this.
"Today he needs treatment and a scan because there's a little fluid in the knee. We have to see."
Klopp, meanwhile, has expressed regret at criticising the Football Association publicly over their handling of teenager Jordan Rossiter.
The midfielder, 18, has been ruled out for the next month with a hamstring injury sustained after playing three games in six days for England's under-19 side during the last international break.
Klopp spoke of his anger at Rossiter's schedule during a news conference on Wednesday, saying: "These young players are our future. If we handle them like horses, we will get horses."
FA technical director Dan Ashworth has since spoken to Klopp, who is now taking a more philosophical approach to the injury.
He said: "I have to learn sometimes to use better words for things, but I have the same problems in German.
"But everything's OK. We'll talk in the next few days. I'm not happy with the situation but I could have informed them before I talked to you.
"It's not the biggest problem, but it's a problem we have to talk about."