Scott Brown could be fit for Saturday's league game with Motherwell - and he is not the only fitness boost for Celtic.
Brown pulled out of Scotland's friendly with Japan at the weekend due to continued discomfort in the ankle he had surgery on in May.
The 24-year-old midfielder had consulted a Harley Street expert, who prescribed a period of rest for Brown.
And Celtic manager Tony Mowbray is optimistic that has alleviated the problem and will help Brown fire on all cylinders as the Bhoys aim to remain top of the table.
"I hope Scott is going to be okay for the Motherwell game," said Mowbray.
"We've been nursing him through the last few weeks and he needed a break. We wanted to give him a rest and the specialist felt that would benefit him too.
"That's why Scott didn't go to Japan and hopefully it will help him over the coming weeks."
Striker Marc-Antoine Fortune has been out for seven weeks with an ankle injury but the summer signing is close to returning after making just two league appearances so far.
"Marc-Antoine Fortune is another player that we're assessing closely and we hope he isn't too far away," Mowbray added.
"Marc had some rehab to do, but he's been back running on the grass and things seem to be fine with him.
"He's looking fit and strong, but we'll move him on to twisting and turning this week and then contact football before too long."
Andreas Hinkel and Danny Fox (both hamstring) could also return soon, while Shaun Maloney (Achilles) is responding well to treatment after being forced out of the Scotland squad.
Australian striker Scott McDonald (back) was another to be ruled out of international duty but is expected to face his former club on Saturday.