Fearful Kenny Miller says changing Connor Goldson have to be Rangers' prime precedence in the summertime window.
And he additionally questioned Gio van Bronckhorst for taking Aaron Ramsey off in opposition to Celtic - feeling the Welshman may have gotten them again into the sport.
Rangers ' defeat on Sunday leaves them six factors behind Celtic and needing a minor miracle if they're to retain their title within the last six video games of the season.
Long term issues additionally search for within the air with key man Goldson wanting set to go away in the summertime when his contract expires.
And former Ibrox striker Miller says discovering a substitute for the centre-back, who has missed simply three video games to this point this season, have to be Van Bronckhorst's principal precedence.
He stated on Go Radio: "If Connor Goldson leaves there's going to be an enormous addition wanted. He is been an ever-present, he is began just about each single recreation since he arrived on the membership 4 years in the past.
"He'll must be changed, that is the primary one.
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"I do not suppose Rangers have improved the beginning lineup since final yr. Aaron Ramsey undoubtedly improves it if he is match, we noticed his class on Sunday and I used to be actually disillusioned he went off.
"He was (the one troubling Celtic). They'd 42 or 43 crosses into the Celtic field, he is the midfielder that is breaking into the field. He desires to attain objectives, he is hungry to attain objectives, he is all the time been that manner."
Fellow pundit John Hartson then raised it to Miller that John Lundstram has been a giant signing after his summer time transfer from Sheffield United.
Miller replied: "He does not get into the field although. That is the factor, Aaron Ramsey has all the time carried out it since he was a child, he did it at Arsenal. He was even doing it for Juve and he is been doing it for Rangers.
"He did it on the weekend, with the possibility that was offside. That ball from Lundstram ought to have been straight by means of to him and he would have been one on one.
"I used to be shocked to see him go off as a result of Aaron Ramsey improves the beginning lineup.
"However going again to the summer time, I do not suppose any signings have been made to enhance that beginning lineup.
"That might want to occur now and it is not only a response to doubtlessly dropping the league to Celtic.
"There could also be bids in for different gamers which will go away, gamers who've been starters.
"However even when everybody stays, you need to enhance. You'll be able to't simply relaxation in your laurels, that is one thing we noticed with Celtic two or three years in the past once they allowed Rangers to get again into it.
"They'd one foot on the neck and so they allow them to up. Rangers have turned that tide beneath Steven Gerrard and it is necessary now that they enhance in the summertime."