Defender John Hinge dislocated a thumb at training on Tuesday evening and could be sidelined for several weeks.And Ken McGregor (Achilles) and Graham Johncock (back) are also unlikely to play in Friday night’s NAB Cup opener.Hinge, who performed solidly in a back pocket in the Friday night trial against Norwood, will see a specialist to determine the extent of his injury.McGregor attempted to train on Tuesday but left the track to rest his foot after taking part in several drills. Johncock is slowly increasing his training workload but will not be rushed back into action.Adelaide trains on Thursday morning from 10am at AAMI Stadium.