Alex McLeish has compared the task facing Micky Beale at Hampden with his shock League Cup win as Birmingham City boss in 2011.
With just one trophy win in their history Birmingham had reached the final against Arsenal while battling against relegation.
Arsene Wenger was able to call on Robin van Persie, Jack Wilshere, Sami Nasri and Andrei Arshavin.
Ben Foster performed heroics in the Birmingham goal to pick up the Man of the Match award, with the game level in the 89th minute Obafemi Martins took advantage of a mix up in the Arsenal defence to pop in the winning goal to give Birmingham a shock win.
Wheeled out to preview Sunday’s Scottish Cup semi-final, McLeish told STV:
There has to be some kind of strategy that not only are you looking for Rangers’ flair players to turn it on but you’ve got to have a strategy to stop the opposition.
I went into a final against Arsenal with Birmingham City a few years ago and we knew the Arsenal strengths so we had to try and stop them. Rangers have to stop Celtic’s strengths.
The fast guys that are in the team, they’ve got to be isolating defenders, getting one on ones and taking people on, making a difference. That’s what we’ve seen Celtic doing in the last 12 months or more.
On the final day of the 2010/11 season Birmingham were relegated and have never been back in the EPL. Since being sacked by Scotland four years ago McLeish has had no direct role in football.
If you think your team are as good as celtic beale attack us so far all you have done us try and press and keep men back that’s how your midfield run out of steam trying to stop celtic play if you play ultra defensive and get beat your fans meaning scottish newspapers will desert you