Alexander Ostlund picked up an ankle injury in the defeat to Coventry on Tuesday night.
Initial diagnosis has shown that Ostlund has possibly damaged ligaments in an ankle.
It will be assessed today, with Ostlund set to have an X-ray on the injury but he is expected to be out for several weeks.
Burley told the Official site: 'Unfortunately Alex has picked up an injury. He was hobbling for the last 15 or 20 minutes and it looks as though he has torn his ankle ligaments.
'We also need to have a look to see if it is broken so it looks as though he will be out for a while.'
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