Former Rangers favourite Jorg Albertz claims a Light Blues victory over Celtic on Sunday would be just as big a shock as Germany's stunning 7-1 thrashing of Brazil.
The retired Ibrox midfielder watched with disbelief as his compatriots turned over the hosts at last summer's World Cup to claim a place in the final.
And the man nicknamed the 'Hammer' likened that result to the Gers potentially nailing their Old Firm rivals in this weekend's QTS Scottish League Cup semi-final at Hampden.
But Albertz insists Ronny Deila's team should not write off Rangers, even if they are playing a division above the Light Blues.
He said: "Of course Rangers have a chance. Every game needs to be played. You can't call the game before the 90 minutes.
"So many times we have seen the favourites fall away and lose games.
"Everyone saw the result when Brazil played Germany at the World Cup. No-one saw Germany winning 7-1. But that is football. Anything can happen. So why can't Rangers win on Sunday?
"The 90 minutes will be played on Sunday and the boys can only do what they can do and that's to give their best. Only then will we see who will win the game."
Albertz made himself an iconic figure for disciples of Glasgow's blue half with a string of important Old Firm goals.
His first strike - a fiercely-hit free-kick clocked at 79mph - sparked wild celebrations at Ibrox back in January 1997 as Walter Smith's side closed in on Nine-in-a-Row.
Now the former German international hopes to see the Rangers faithful raise the roof once again on Sunday.
He said: "Everybody knows my favourite Old Firm memory is my first goal against Celtic, the free-kick at Ibrox.
"That was a great day and I hope the current guys can experience something like that.
"It doesn't matter who is on the sidelines managing the side. Every player knows about the Old Firm - you have to go out and do your best."
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