Kilmarnock boss Derek McInnes is convinced Rangers will not settle for second best against Celtic despite their Europa League Final pursuit.
Giovanni van Bronckhorst 's side travel across the city for a High Noon showdown knowing a defeat will end their title hopes.
And the Dutchman faces some big personnel decisions to make with the second leg of their semi final with RB Leipzig looming on Thursday.
Some have called for van Bronckhorst to prioritise the clash with the Germans as they sit six points behind Celtic.
However, McInnes believes Rangers will gain more from going full pelt in the search for a result rather than taking a conservative approach.
Speaking in the Mail on Sunday, he said: "Giovanni seems very calm, collected and sure of himself. I don't expect him to be swayed by anyone.
"I've heard all the arguments about how he should play a weakened team against Celtic today in order to keep his players fresh for the second leg of the Europa League semi-final against Leipzig.
"Europe is now the priority in so many people's eyes. But that's precisely why he needs to send out a strong team to try to win at Parkhead.
"Rangers won't want to go into the second leg against Leipzig on the back of two defeats.
"And as a Rangers player, any defeat to Celtic lingers heavy. It damages you.
"That's why I can't see him making wholesale changes. He has the luxury of being able to freshen it up in three or four positions, especially in midfield.
"The likes of Steven Davis, Scott Arfield and maybe even James Sands could all come in.
"The top end of the pitch remains the issue. There are limitations in terms of options but I genuinely think Rangers will set out to try to win the game."
McInnes has been impressed by the Ange Postecoglou approach this season as they remain undefeated in the league since September.
But the 50-year-old reckons it's time to mix it up in the wake of their Scottish Cup semi final defeat to their biggest rivals a fortnight ago.
He added: "Domestically, Celtic will see this as their chance to finish off Rangers. It's an opportunity to win the league and beat their biggest rivals at the same time.
"But they too need to show that they have learned from Hampden.
"Rangers overcame their European rigours to harry and chase Celtic to the point where they could not settle and play their natural game.
"By the time the game settled down and there was a bit more space, Celtic seemed to have lost their way and that's because Rangers won the initial battle.
"Celtic normally find a way but at Hampden they didn't. It takes a lot of discipline and concentration to do the right thing out of possession every time. Rangers did that.
"Celtic need to expect that again and perhaps come up with something different.
"I think they will look to go in behind Rangers a bit more and mix the game up a wee bit. If Rangers are putting the high press on and pushing their defenders up to the halfway line, Celtic need to give them something to think about.
"The one way to sow the seed of doubt in Rangers is to run in behind. For that reason, Kyogo is a definite starter for me at No 9. He has to play with a bit of freedom, chase and get behind both centre-backs.
"Do that and Rangers have to think twice about the high press.
"Postecoglou could go with two up front and play Giorgos Giakoumakis with Kyogo. But that would involve a complete reshape.
"He doesn't need to do that."
