The England Under-21 international had surgery on the injury in November, which ruled him out for a month, and although the 19-year-old did return to duty at Tottenham earlier this month, he is now back on the sidelines after complaining of similar pains in a slightly different area.
"Michael has had a scan and the specialists say where he was operated on is not a problem because this injury is higher up," explained Eriksson. "But yes, we are a bit worried that it came back and we hope it will not be there for long."
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