Rangers legend Brian Laudrup has claimed Giovanni van Bronckhorst has a "huge problem" with Manchester United loanee Amad Diallo.
After scoring five minutes into his Rangers debut, the 19-year-old winger has failed to impress and was hooked at half-time of the Old Firm loss to Celtic back in February.
"Giovanni van Bronckhorst's team have simply failed to gather necessary domestic results since the winter break," Laudrup said his column for the Daily Mail. "You could argue about a need to change personnel. But, for me, there is now an obvious concern on that front when you think back to the January window.
"At the midpoint of the season, you are looking for players who can offer fresh blood and impetus. But it just hasn't happened for Rangers. At least not yet.
"Look at Sunday as a perfect example. After Motherwell pulled it back to 2-2 with 14 minutes remaining, you think it's time to put on someone capable of making a difference in an attacking sense. A player who can create things and deliver a breakthrough.
"But Amad Diallo didn't get off the bench. As Rangers looked in vain for a winner, the Manchester United loanee wasn't asked to contribute. In fact, Kemar Roofe was the only substitute introduced with seven minutes remaining. That surely says something.
"Then you have the fact Aaron Ramsey again didn't make the squad as he tries, I assume, to get to the right condition after his well-publicised injury issues at Juventus. No one doubts Ramsey's huge quality but time is running out for this loan move to be effective. The Wales star has not been able to make the difference many hoped he would.
"In truth, it looks like Van Bronckhorst only truly trusts a certain portion of his squad to go and start games right now.
"Without that new blood from January being effective, and with Rangers still being in Europe, this relative lack of options can start to take a toll. It's not an excuse for under-performance or not getting the job done, but it can be a factor if the manager doesn't feel able to freshen things up.
"We all know it takes time to gel at a new club. But, for differing reasons, it seems Diallo, Ramsey and (James) Sands haven't convinced Van Bronckhorst that they are yet able to go and take on major responsibility in this title race. For me, that's a huge problem."
