Liverpool manager Jurgen Klopp says he will take a late decision on whether Jordan Henderson, Daniel Sturridge and Philippe Coutinho will face Southampton tonight.
The two Englishmen came on in the second half against Swansea City on Sunday with the Brazilian not even on the bench.
But the three could feature against the Saints as the Reds chase a place in the semi-finals of the League Cup.
"They [Jordan Henderson and Daniel Sturridge] have had no physical reaction [after Sunday]. It's good news and they did their job," Klopp told reporters.
"That was good and important for us. They helped us keep the result, which was not easy – especially for Jordan in his position.
"Daniel did what we spoke about before, that he should be our target for winning balls, once we got the ball be an option, the first option. That's what he did; everybody could see his quality in a few moments. It was good for us.
"Now the problem with the Southampton game is we cannot ignore that it could be extra-time. I'm sure 120 minutes would be too much for both.
"We don't have to think about starting, we cannot go into a game and know we have to change these two players for sure. But if nothing happens from now until the plane has started, they'll join us and be in the squad and we again have these two options.
"I cannot make decisions [on them and Philippe Coutinho's fitness] in this moment because we have another training [session] today.
"At the end, we have to talk about everything again with the medical department and talk to Phil. It will be close, possible, but we have to check and double check the situation and then we'll make a decision. We have to wait."