The 25-year-old former Rotherham player was replaced at half-time during Quins' bonus-point win at Sixways and will now have a scan later today.
Speaking immediately after his side's fourth win of the season, Quins boss Dean Richards said: "David has hurt his foot. He will have a scan tomorrow.
"He came off as a precautionary measure, and we will have to wait and see what the results of the medical checks are."







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