Ange Postecoglou uninterested in writing Celtic defeat off as boss insists 'everything is under scrutiny'

Ange Postecoglou has vowed Celtic will learn harsh lessons from their painful day in Paisley.

But the Parkhead boss is facing further problems with £6 million defender Cameron Carter-Vickers a big doubt for the next Champions League showdown against RB Leipzig. Postecoglou was left bitterly disappointed after his side’s 364-day unbeaten Premiership run was ended by St Mirren.

The Aussie’s team were off it in every department and he made no attempts to brush it aside or put it down to just a bad day. Instead, Postecoglou is adamant his team must take on board what went badly wrong and said: “We just weren’t aggressive both in action and in thought. We kind of tried to ease our way into a game of football and you just can’t do that. You’ve got to be at it from the start and we weren’t. You can’t take all the praise as you go along and then expect people just to brush over it.

“You don’t put it down to one of those days, it’s a disappointing day. We pride ourselves on having certain standards and we didn’t reach those. And football will always teach you that lesson. What has got us to this point over the past 15 or 16 months is having a certain work ethic and certain levels of performance and belief. We didn’t reach any of those. We’ve got to take the hits when they come and we’ve just got to get back up and go again.

“We’ve done that before as a team over the past 15 or 16 months. It’s a sore one, it’s one that we’ve got to use as the fuel we need next to get going again. Look, in terms of reaction, the reaction will be the reaction. We were nowhere near the levels we want to be. Credit to St Mirren first of all. They worked really hard and were really committed to their gameplan. They made it hard for us, but we never