Leon Osman has 'an outside chance' of being fit for Saturday's league fixture at Sunderland according to David Moyes.
The midfielder was absent for Tuesday's 0-0 draw against Arsenal with a groin problem, having been in imperious form this term.
And, speaking at his pre-match press conference on Friday, Blues boss Moyes revealed that the England midfielder was improving as the days passed.
"Leon's getting better," he said. "I don't know if [the game] will come too quick for him.
"He'll have an outside chance so we'll need to see how he is."
Reporting no fresh injury concerns from the hard-fought battle at the Emirates, Moyes also insisted he had no need to rush Tony Hibbert back into first-team action.
The veteran right-back has missed over four months of fixtures following calf surgery, but has returned to feature for the Club's Under-21 side in recent weeks.
But with the dazzling displays of Seamus Coleman in his absence, Moyes is willing to be patient with the 32-year-old.
"We're not in a great need to rush Tony back playing," he explained.
"I have Seamus Coleman and John Stones, so I am not desperately in a rush to get him back playing.
"He will probably get another run-out for the reserves this week and if that goes well hopefully it will be him near enough back to the level of being involved with the first team."