Bolton midfielder Stuart Holden will miss another six months of action because of a persistent knee problem, the club has confirmed.
Holden made his first appearance in club colours since rupturing knee ligaments in March during last week's Carling Cup victory over Aston Villa.
However, a routine follow-up operation has since revealed cartilage damage which will keep the USA international sidelined for an extended period.
"It is a big, big blow for Stuart," Wanderers boss Owen Coyle told the club's official website.
"He has worked so hard after he sustained the injury, but obviously the most important aspect is to ensure Stuart's well-being and that's what we are focused on.
"He went in for the procedure [Wednesday] afternoon and it was picked up that the cartilage was damaged and needed to be repaired, which has now happened, and we will now support Stuart as he begins his recovery."
Holden wrote on his Twitter page: "Floored, devastated, gutted, just a few words I can think of. I will continue to fight and I'm ready for another tough journey... Not looking 4 sympathy but rather your support as I get through another setback. Thx for all your heartfelt messages of encouragment.
"Someone has a bigger plan for me and I look forward to keeping you updated over the next 6 months as I beat the odds once again .. Much love."