The right-back has not yet played this season for Enzo Maresca's team.
But The Sun claims that the defender's recovery progress has slowed due to setbacks.
There is a serious concern that the defender's hamstring injury hasn't healed as well as expected.
James does not have a new injury in the area, according to club insiders, but the issue is still worrying.
He has spent months on the sidelines and has been eased back by the club in every possible way.