I questioned Rangers signing Jack Butland but he's up there with Goram, Klos and McGregor – Barry Ferguson

Really good goalkeepers can be trusted to pull off 99 per cent of the saves expected of them. And I’ve played with a few of them in my time.

But the truly great keepers make the ones that are not. And guys like that don’t come around too often. As a kid I’d sit in the stand at Ibrox and watch Andy Goram do it, time after time. As a player, I was lucky enough to share a dressing room with Stefan Klos and later Allan McGregor. And I lost count of the amount of moments when they’d come up with something out of the ordinary just when the team was up against it and needed their help the most.

I’d see them keep out a certain goal and I’d think to myself, ‘What a save that is by the way. Right, the rest of us need to get the finger out now!’. So, when Jack Butland threw himself to his right to claw out a shot from Matty Kennedy at point blank range on Wednesday night, I turned to my two boys and told them, ‘That’s the game changer’. Sometimes, in the tightest moments and the biggest matches, it takes something like that to inspire the rest of the side.

When you see your own keeper going above and beyond in the line of fire, it makes you even more determined to make sure you play your part by doing something significant at the other end of the pitch. Yes, James Tavernier grabbed the bull by the horns when he came up with another special free-kick to drag Rangers level at Kilmarnock at a crucial stage in the game. And Tom Lawrence too stepped up to the plate when he netted the winner to keep my old club at the top of the table.

Like Butland, they deserve enormous credit for showing the balls and the steel required to help their side out of a sticky situation. But we’ll get back to them later. Because if Butland doesn’t make that