Scimeca went off injured against Leicester last weekend.
'I had a scan on Tuesday and I have a grade one tear, which will keep me out for around four weeks,' Scimeca told the Echo.
'I was expecting to shake it off but came off during Saturday's game against Leicester because it was not easing.
'Normally those type of things tend to ease over 24 hours but this was still hurting on Sunday. It was best to have a scan.
'It's a major disappointment to me as the whole team started to believe in themselves again and although we are not playing fantastic football at present we were winning.
'We're steadily progressing and working ourselves back into a wining habit, which has been missing recently.'