Liverpool were assessing the fitness of skipper Steven Gerrard on Thursday and bracing themselves for more injury problems for the England midfielder.
Gerrard arrived at the club's Melwood training complex for fitness tests which were being reviewed by Liverpool's medical teams.
Liverpool would not confirm any injury problem for Gerrard on Thursday, but on Wednesday night, boss Rafael Benitez said after the match: "Steven was not 100% - you could see that. It was the same for Fernando Torres, you could see that they were a little tired, not as sharp as before."
He added: "But they have been playing well and we felt it was okay to use them both in this game. We need them."
The 29-year-old was sidelined in February with a hamstring injury sustained in the FA Cup trilogy with Everton, and he has also suffered groin problems this term.
Before Wednesday night's Champions League defeat by Chelsea there had been fears that Gerrard was still struggling from the ankle injury which forced his precautionary exit from Saturday's win at Fulham, although he trained with the squad on Monday and Tuesday, and was passed fit to play.
However, there is now speculation that the England midfielder has suffered a recurrence of a previous groin problem.
If that is the case he could miss Saturday's home Barclays Premier League game with Blackburn as well as the second leg of the European tie at Stamford Bridge next Tuesday.
Benitez added: "Credit to Chelsea, they were always controlling Steven and making it difficult for him to play. He was not as mobile as normally, Chelsea made it very difficult for him. But the difference in this match was that Chelsea played really well and we didn't.
"The injury he had on Saturday was not the problem, his ankle was okay. But we do not know how he is, we will see."
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