Celtic icon Frank McAvennie insists Steven Davis is a 'huge' figure for Rangers and they must retain him beyond the summer.
Former Hoops striker McAvennie used Jermain Defoe as a prime example of how big an influence Davis can have.
The veteran midfielder is currently sidelined through injury and is out of contract in the summer. The Northern Ireland captain is one of a number of key players who the future remains unclear for at this stage but is one Macca would retain.
