The two giants will meet at Hampden Park next month.
Andy Goram believes that Celtic should be more worried than Rangers ahead of their Scottish Cup semi-final, and suggested that Ronny Deila's men are particularly weak at the back, the Evening Times reports.
The Old Firm rivals meet at Hampden Park in the last four of the Scottish Cup in mid-April, and despite them being in separate divisions, the Ibrox hero insisted that Celtic have enough problems to allow Mark Warburton's men to book their place in the final of the competition.
"I think Celtic will be more worried about us than we will be about them given the way we are playing," he told the Evening Times.
"They are certainly vulnerable. I would love the game to be right now because I thought Rangers' performance against Dundee in the last round was sensational.
"When Celtic turn up, they are a right good side. However, everyone knows that they are vulnerable at the back."
While Warburton may have been concerned that Martyn Waghorn's injury - the striker is doubtful for the semi-final due to a knee injury sustained in a previous round (via STV) - would leave the Light Blues with a lack of fire power that would not allow them to exploit the area that Goram believes will be Celtic's biggest problem, their recent results have proved how much depth they have going forward.
Since Waghorn's last game, the Gers have scored 11 goals including four in a stunning performance against Scottish Premiership side Dundee in the quarter-final.
However, Warburton will surely be looking for his side to remain focused on the job rather than believe that Celtic's back-line will just crumble under pressure, as the Hoops boast their own lethal goalscorer in Leigh Griffiths, and if Rangers do not give him enough attention, their hopes of victory on derby day could be dashed very quickly.