The 27-year old has featured in every Premier League game so far this season but was forced out of the 2-0 win over Cardiff City on Saturday and is in some doubt for the trip to Stamford Bridge.
However, the former Derby County man has indicated that perhaps he could get up for the London derby if scan results are positive.
"I've had a scan this morning so it's just about waiting for the results now," he told the club's official website.
"Obviously, Chelsea is one of the games you look forward to at the start of the season, so I just want to be back."
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