Celtic beat Kilmarnock 1-0 on Saturday afternoon to strengthen their title push.
Former Celtic striker and current pundit Andy Walker has told Sky Sports that he thinks Tom Rogic's goal against Kilmarnock was a season-defining moment for the Bhoys.
Celtic travelled to Rugby Park on Saturday afternoon in search of a vital three points, but as the game entered its dying stages, it looked like manager Ronny Deila would be left frustrated with the scoreline at 0-0.
However, substitute Tom Rogic popped up with a stunning long range strike to win the game in stoppage time, and Aberdeen's defeat at Motherwell later in the day meant that Celtic moved to four points clear at the top of the Scottish Championship with a game in hand.
It was a much-needed win for manager Deila, who has been feeling the pressure throughout the season after some disappointing performances, and the Norwegian will have been wary of former Celtic players such as David Moyes and Malky Mackay announcing their interest in taking the job at Celtic Park, should Deila leave this summer - as many expect him to do.
Now, former Bhoys forward and current pundit Andy Walker has spoken to Sky Sports about the situation, suggesting that Deila will have been feeling the pressure as he bids to secure his Celtic future, before praising him for a match-winning decision against Kilmarnock.
Walker suggested that Deila came up with a big moment, by bringing on Tom Rogic instead of James Forrest - and claimed Rogic's goal was ultimately a season defining moment, something Deila deserves great credit for.
"I can't help but feeling that that was a defining moment," said Walker. "Ronny Deila has been under pressure for some time now, maybe even more so this week with some former players putting their hat in the ring to potentially take over if it doesn't work out right for Ronny Deila."
"I think you have to live with that pressure, and you have to come up with big moments, and to be fair to Ronny Deila, he's made some big substitutions. It looked as though for some time that James Forrest was going to come on, but in the end it was Rogic, and he proved to be the match-winner, so you have to give him credit for that," he added.
Do you think Deila is being harshly treated?