Celtic are now just two points clear at the top of the Scottish Premiership, with five dropped in their last two fixtures.
A 2-1 defeat to Dundee United prior to Christmas was followed by an uninspiring goalless draw with Ross County on Saturday.
Ronny Deila is suddenly a man under pressure, with the Norwegian having failed to convince since inheriting the reins from Neil Lennon over the summer.
He would have been expected to oversee a canter towards the title, but he now finds himself in a battle for the crown and his job.
Former Hoops striker Frank McAvennie is among those fearing for the Parkhead boss, with it his opinion that Deila is failing to inspire confidence on and off the field.
He said in the Daily Record: “I stand by my original comments in August about Deila. He seems to be sticking by this game plan where Celtic are supposed to dictate games and play at a high tempo.
“Celtic need to win games that is the be-all and end-all. They will get away with not playing well as long as they are winning games. Under Deila they are not winning matches on a consistent basis.
“I desperately want to like Deila – I feel for him and I want him to do well. He has a real enthusiasm about the Celtic job and I never want him to lose that. As a fan I want him to be a successful manager of the club I support.
“However I saw Deila’s interview and the comments he made right after the Ross County game. It’s the first time I’ve thought he looked a bit lost.
“That is a huge concern. He looked visibly shaken by the Ross County result and he did not appear to know what was happening or what to do.
“He was strong enough to come out and face the press after another bad result. But the manager can’t keep coming out and saying Celtic missed chances. You need to score goals to win games – it’s as simple as that.”
Deila only signed a 12-month rolling contract upon his arrival in Glasgow, so his deal would not be difficult to break.
He will, however, want to prove that he can turn things around over the remainder of the campaign and cement Celtic’s dominance in the domestic game.
If he can do that, he will have done what was required of him and may grow in belief and confidence as he starts to feel more at home in British football. On the other hand, he may not and could find himself out of a job.