The former Celtic goalkeeper has been discussing the Norwegian coach.
Ex-Celtic man Pat Bonner feels people will ask questions of Ronny Deila if the Scottish champions don't get positive results against Molde or progress from their Europa League group, according to BBC Scotland.
The Bhoys currently sit top of the Scottish Premiership but set the tone for their season by failing to qualify for the Champions League.
And that's why Bonner feels further failure in the Europa League could spell uncertainty when it comes to where Celtic are headed under Deila's management.
Bonner told the BBC: "If they get positive results, they could win the group.
"But if he doesn't get [those results], people will be asking questions and certainly if he doesn't get out of the group they'll be wondering where are we going here.
"They failed in the Champions League of course but they've gone top of the [Scottish Premier] League now, which they'll be delighted with. But I think Europe is the benchmark."
Former Celtic striker John Hartson made a similar suggestion about Deila's future earlier this season.
His was more emphatic, with the now BBC pundit suggesting the Norwegian's job may not be safe next summer if the Bhoys failed to make the Champions League group stage.
Celtic fans responded emphatically on social media, letting Hartson know they backed their manager wholeheartedly.
Bonner is right, of course, in that the Bhoys' truest competition comes only in Europe. But Deila hasn't exactly received the financial backing some of his predecessors did, so would it really be fair to pin any Europa League failures solely on him? It's certainly up for debate...