Bristol City left-back Jamie McAllister has been sidelined for at least two months.
The 33-year-old sustained an ankle injury in Saturday's draw against Doncaster and will need surgery to rectify the problem.
He told the club's official website: "I'm absolutely gutted. I'd felt pain in the ankle and went to go and get an injection just to settle it down. Sadly I was told an injection wouldn't do anything for the problem and that I needed an operation."
He added: "This is the first operation I've required in my whole career.
"It's such a bad time, with the new season just underway, and I'll be working hard to get back as soon as possible."
McAllister's injury may mean new loanee Ryan McGivern could be handed a debut in defence against Brighton on September 10.
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