Graeme Murty: Margins between Rangers & Celtic are smaller than ever ahead of O** F*** clash

MIND games are nothing new in football. The great Sir Alex Ferguson was a master in the art of mental gamesmanship – just ask Kevin Keegan and has poor Fergie voodoo doll – while coaches from Madrid to Montrose have been known to dabble in trying to either dish out a psychological blow or gain a mental margin ahead of a big game...