Ange Postecoglou turns up the Celtic heat on Rangers as boss insists 'they have to beat us'

It has been the most scintillating 45 minutes of Ange Postecoglou ’s reign at Celtic so far.

A midweek Old Firm night at Parkhead, with the atmosphere crackling from every corner of the ground.

Before kick-off, the place was in darkness except for the huge spotlight on the team huddle.

It almost felt symbolic because they HAD to deliver against the champions and prospective Europa League semi-finalists.

And for a half, they simply blew Rangers away.

Three goals, fast-paced attacking football – it was exactly how Postecoglou wanted his side to play.

And the thumping 3-0 victory over their Glasgow rivals put them top of the Premiership for the first time this season.

Celtic haven’t looked back since. If they pick up a further three points today against Gio van Bronckhorst ’s side, the engraver can get started on the trophy.

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The manager would be content with a similar performance to the one he witnessed back in February.

Back-handed compliments are rare when they’re going from one half of the Old Firm to the other.

But Postecoglou says their display that night against van Bronckhorst’s men was pivotal in proving to him they could play his brand of football against a top-quality team.

As he