Rangers can boast a formidable defensive record, letting in just six goals in their past 10 games.
However, they have conceded twice in each of their most recent away days, 2-2 draws at Dundee and Hearts.
Emmanuel Fernandez came in for some stick after a few hairy moments at Tynecastle but manager Derek McInnes was quick to defend the Nigeria centre-half.
"I never get asked about Manny when he does really well and he's been a big part of our better performances this season," he said the other day.
