Jurgen Klopp says he will have to wait "minute by minute" before making a decision on whether Dejan Lovren can face Bayern Munich in Tuesday's Champions League tie.
Croatia centre-back Lovren has not played since injuring his hamstring in the FA Cup third-round defeat to Wolves on January 7.
With Joe Gomez injured and Virgil van Dijk suspended for the last-16 first-leg tie at Anfield, having Lovren available would be a major boost for the Reds.
But Klopp told Liverpool's official website it is too soon to make a decision.
"I don't know 100 per cent. It's Monday and we play on Tuesday so most of that should be clear," he said.
"Dejan, I actually have to wait minute by minute if there is a chance or not."
"Our crowd is able to push it from 100 to 120, 30 or 40 per cent." 💫 pic.twitter.com/rvf1JggXV5— Liverpool FC (@LFC) February 18, 2019
Klopp sounded more hopeful on the availability of former Bayern winger Xherdan Shaqiri, who has been contending with an abdominal problem, and Georginio Wijnaldum following his recovery from illness, with the pair having taken part in training.
"Gini trained and looked really well. Shaq did a lot, so it will be close, we have to see," he added.