Aaron Ramsey set Rangers vs Celtic challenge as Ally McCoist tries to blank out the 'unthinkable'

Ally McCoist insists it would be “unthinkable” for Rangers to lose next week’s Old Firm crunch.

The Ibrox hero reckons the gap at the top would be too big for Gio van Bronckhorst’s side to overcome should they slump to a damaging derby defeat.

But McCoist is confident his old club will rise to the occasion and ensure the defence of their title will go to the wire.