Camilo Duran played as if his change of position affected him during Celtic's defeat to Rangers, reckons Michael Stewart.
Duran started the season on fire playing on the right wing, scoring goals and terrorising defences. But when Kasper Hogh was injured, the Colombian was mved to centre forward and continued his form.
However, he was moved back to the right wing with the Dane fit again. Like the rest of his teammates, Duran was ineffectual during the derby defeat.
Stewart thought it was evident the former Qarabag man wasn't enjoying being out wide again.
Speaking on the Premier Sports Scottish Football Social Club, he said: "Kasper Hogh has now had a number of games where he has looked off it, and in big games (too).
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"Then you've got Duran. Initially when he was playing off that right hand side, he looked lively, energised and really good. But to me on Sunday, it looked like the fact he was not playing through the middle was playing on his mind a little bit.
"From Celtic's perspective, that dynamic is now not as certain as it looked a few weeks ago. They are trying to find out how you get all of that together.
"(Haissem) Hassan looks like a guy you are going to start but now it's a case of 'what side are you playing Hassan on? Where is Duran going to play and is Kasper Hogh going to be the guy to lead the line?"
Stewart also thought Celtic's midfield was a problem, specifically a lack of physicality. And he thought summer exit Arne Engels was missed in that regard.
"The physicality in (Celtic's midfield) is a big one", he continued. "It was the second big game after LASK that Celtic have been overrun.
"I mentioned it after the LASK game but if Arne Engels had been playing in that, I don't think Celtic would have crumbled like that.
"His physicality and athleticism helped Callum McGregor and without him, it causes the concern where teams are able to bully Celtic.
"That was, to a large extent, what was happening there (at Ibrox) yesterday."
