Kris Commons reckons Rangers can summon the spirit of Celtic's famous win over Barcelona when Lyon come to Ibrox.
Steven Gerrard 's side kick off their Europa League group stage campaign against the Ligue 1 giants on Thursday but face a shortage of options at centre-back.
Connor Goldson and Filip Helander could miss out while Jack Simpson was not included in the squad registered for the tournament.
Leon Balogun could be partnered by Calvin Bassey at centre-back and tasked with stopping former Celtic striker Moussa Dembele.
Commons was part of the Parkhead side which shocked Barca in the Champions League in 2012 and he's pointed out they did it with a number of their top players unavailable.
"There are times in football when you can find strength and unity in the face of adversity," he wrote in the Daily Mail.
"When I think back to my own career at Celtic, our squad was decimated by injuries when we beat Barcelona in the Champions League in 2012.
"Our captain Scott Brown missed out through illness. Our main goalscorer Gary Hooper was out injured, while the likes of James Forrest and Emilio Izaguirre also missed out.
"Georgios Samaras captained us that night, with Miku playing up front. I was having to slot in as a sort of right wing-back at times, a position I'd never played in my life. That was the same for a few of the other boys.
"They were asked to do things that night which, ordinarily, would have been totally out of their comfort zone.
"But you knuckle down and put in a shift. You have to rally in the face of a crisis. If they do that, then Rangers might just find their own Tony Watt to pop up and become a hero."
