On-loan Norwich City goalkeeper Remi Matthews will be sidelined for up to three months after an injury picked up with Hamilton Academical.
The 22-year-old Englishman travelled back to his parent club for diagnosis after Saturday's 1-1 draw with Inverness Caledonian Thistle.
"Unfortunately I have torn my ac joint in my shoulder," he said on Twitter.
"Which is going to keep me out for around two to three months. Gutted I won't be involved in upcoming games."
Matthews joined Accies on a season-long loan from the English Championship club and has made 13 appearances.