Derek McInnes convinced Rangers won't lose to Celtic as big name Ibrox pair told your time is now

Former Rangers midfielder Derek McInnes is certain the Premiership champions will not lose to leaders Celtic in Sunday's blockbuster Old Firm derby.

But the Kilmarnock manager admits the path to victory is made more treacherous without talisman Alfredo Morelos' leading the way after his muscle injury.

McInnes expects Gio van Bronckhorst's whole squad to raise their game in the final weeks of the season in a bid to overhaul league leaders Celtic.

And he sees marquee January arrival Aaron Ramsey and Morelos' understudy Kemar Roofe as the two stars who can change the game if they step up at Ibrox.

Speaking in his Daily Mail column, he said: "Last month, I wrote that certain members of the Rangers squad needed to put their hands up and allow Van Bronckhorst to freshen things up. The time is now and the focus will be on Kemar Roofe and Aaron Ramsey in particular.

"Losing Morelos weakens Rangers in attack but they pay Roofe handsomely. He is there to be ready.

"Rangers have shelled out a lot of money both in wages and a hefty transfer fee to Anderlecht for a guy who has not been starting.

"I thought it was a really good signing at the time and you would have to say he has done okay.

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