Coventry midfielder Aron Gunnarsson suffered a suspected broken wrist in the Sky Blues 1-0 home defeat to Plymouth.
The Icelander sustained the injury following a second-half collision with Argyle defender Mathias Doumbe.
It is not yet known how long Gunnarsson will be out for. He is set for X-rays to determine the extent of the damage.
The 19-year-old would miss the Championship clash at Sheffield Wednesday at the weekend in any event after collecting his fifth yellow card of the season against Plymouth. He must serve a one-match suspension.
"He had a bad fall on it and landed heavily on it. We need to see what the x-rays say but we are pretty sure it is broken. It all depends on which bone," said Coventry boss Chris Coleman.
"Maybe he can have a cast on or strapping to enable him to play but we won't know until we get the report back."
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