Deila is under pressure at the moment due to Celtic’s disappointing performances in recent weeks.
The Glasgow giants failed to progress to the Europa League knockout stages and recently got knocked out of the Scottish League Cup at the semi-final stage.
Former Celtic winger Provan is critical of Deila, but he seems to admire Deila’s honesty in accepting blame for the team’s poor performances.
“Even in his darkest moments, the Norwegian has fronted up with everyone,” the former Scotland international wrote in The Scottish Sun. “If honesty had currency in football Deila would be managing one of Europe’s elite clubs.
“But here’s the rub. Despite his decency Ronny is coming up well short. In a results-driven business, his numbers haven’t been good enough at a club where managers should expect to be judged harshly.”
Celtic are at the top of the Scottish Premiership table at the moment with 58 points from 25 matches.
The Bhoys are three points clear of second-placed Aberdeen and are favourites to win the league title this season.
However, it seems that the Hoops will face competition from Aberdeen in the coming weeks.
Celtic will return to action next weekend when they take on Inverness Caledonian Thistle at Celtic Park in the Scottish Premiership.