Jores Okore is "touch and go" to return this season.
That's according to Paul Lambert, who has watched Okore return to the fields of Bodymoor Heath after months of rehabbing in the gym.
Okore, who injured his knee in the game against Newcastle, is currently working hard outside - twisting, turning and running under the guidance of the physiotherapists and away from the main first team group.
Lambert says there's a slim chance Okore will be back before May 11 - but believes it's more important to have him firing on all cylinders in 2014-15.
The boss is eager to make sure Okore doesn't rush back and injure himself again.
Lambert also revealed that Libor Kozak is progressing very well from the broken leg he suffered on New Year's Day although the Czech Republic striker will definitely not be fit again this term.
He said: "Jores is doing great and Libor is doing well.
"Libor came off his crutches a few weeks ago, which is really good. He won't be back this season though.
"Jores will be touch and go - but he won't be too far away.
"He's doing great - he's doing really well in his rehab.
"But what you don't want to do is give him 20 minutes and, if he's not ready, then he's out a full season next time.
"You may as well get him back 100% and let him go from there. But at this minute in time he's doing really well."
Nicklas Helenius also returned to full training this week, after shaking off the latest of his troublesome niggles, a thigh strain.
Gary Gardner, meanwhile, is still some way off after injuring his foot.
Lambert added: "Nicklas has trained but he's probably not match fit. He's back in training this week.
"Gary is still a wee bit away from it. It's frustrating for him but he is still a bit away. It's his foot."
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