FORMER Celtic ace Charlie Nicholas says he's seen enough of his old team over the years to know that they're "stuttering" at the moment.
The ex-Hoops ace reckons for the first time in a long time under Ange Postecoglou that questions are being asked about his team selection.
With Cameron Carter-Vickers currently out of action through injury, Nicholas believes his old team look vulnerable at the back.
He reckons this poses cause for concern ahead of tomorrow's match with RB Leipzig.
He wrote in the Scottish Daily Express: "When Celtic are going forward, I feel more comfortable. They played well in the 1-1 draw with Shakhtar in Warsaw.
"However, I have watched Celtic enough to know there is a stuttering element to them at the moment. There is not the same fluency and rhythm. Postecoglou is not getting what he wants from his team right now.
"For the first time since the early weeks of his Parkhead reign, he is having to question whether he's getting the balance right.
"The centre-back pairing of Stephen Welsh and Moritz Jenz has looked vulnerable in their last two league games, while Josip Juranovic and Joe Hart have made bad mistakes.
"Defensively, I am concerned about the Leipzig game. That's why I'd take a draw without hesitation.
"The German side's movement up front could be too much for Celtic. Attacker Christopher Nkunku is unpredictable and a major danger.
"I remember his performance against Rangers in last season's Europa League semi-final when he missed a few chances, but his pace is brutally quick. Striker Timo Werner is a fabulous player too.
"Depending on which centre-halves are fit, Celtic may have to play five or 10 yards deeper.
"There are already major concerns about how much Cameron Carter-Vickers is missed when he's not in the team, and if he doesn't shake off his knock by tomorrow they could be exposed."