Harewood was ruled out of Sunday´s 1-0 defeat at Manchester City after pulling up in training on Friday and initial examinations suggested he could be out for two months with a stress fracture.
"At the end of training on Friday he pulled up with a problem at the back of the knee. He´d had a bit of discomfort there some weeks ago - at the back end of last season with West Ham - but I think the rest during the summer had allowed it to settle down," O´Neill told the club´s website, www.avfc.co.uk.
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