Michael Beale is not in the Rangers manager’s office but an isolation unit during Celtic endurance test - Hugh Keevins

Aberdeen haven’t won a league match against Rangers at Ibrox for five years. In fact, they’ve only won two league games against Rangers at Ibrox in the last 31 years.

If you apply the law of averages, the Dons are, at that rate, not scheduled to win another league game at Ibrox for a decade. But if you’re a disillusioned Rangers fan more concerned about Sod’s Law you might be inclined to worry it could happen today. If it can go wrong, it will go wrong for Michael Beale at the moment. The season’s a goner in terms of trophies available to be won.

There’s deep concern among the support at the manager’s inability to win against Celtic. And people in positions of responsibility at Ibrox are leaving left, right and centre. Craig Mulholland, the club’s academy director, and finance director Andrew Dickson being are the latest evacuees. We’ve already seen former chairman Douglas Park, sporting director Ross Wilson and soon-to-be former managing director Stewart Robertson leave.

Beale is not so much in the manager’s office as an isolation unit. He is the centre of attention and the remainder of his season, in the wake of last weekend’s Scottish Cup exit to Celtic, is an endurance test.

And Beale could be doing without further mishap today against an Aberdeen side who scored a PR goal last week by appointing Barry Robson as manager on a permanent basis after seven successive wins while in interim charge at Pittodrie.

It gives them a look of stability while Rangers are suffering from the insecurity caused by bad results and an uncertain future. Last time Aberdeen were at Ibrox it was exactly the same scenario for the home side.

That was in November, when Beale arrived in a stage-managed fashion to highlight his availability and