Rangers have dipped this season and Celtic can catch them in the title race. The Ibrox club romped to the Premiership title last season going unbeaten throughout the campaign and finishing 25 points clear of their city rivals.
So far this campaign Steven Gerrard's men have already earned a win over Celtic, and sit in top spot once again despite a lukewarm start to the campaign.
Barnes has backed Ange Postecoglou to mount a title challenge, insisting the Australian can mastermind a fightback after the 10 In A Row disappointment last term.
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