The Bhoys will take on Tommy Wright’s side at Celtic Park in the Scottish Premiership this evening.
St Johnstone are currently seventh in the league table with 38 points from 27 matches, while Celtic are six points clear at the top of the standings with a game in hand over second-placed Aberdeen.
Glasgow giants Celtic will be favourites to pick up all three points tonight, but Deila believes that it will be a hard match.
"They have very good spirit in the team and they’re hard working,” the Norwegian said in a press conference on Tuesday, as reported by Celtic’s official Twitter account. ”They’re very clear in their play and will be hard to beat.”
Will Celtic slip up?
It is clear that Deila is not taking St. Johnstone lightly and is not allowing any complacency to creep into his team, but it is hard to see anything other than a Celtic win tonight.
The Hoops are currently on a 10-game unbeaten run in the Premiership and have a team superior to that of the visitors.
Playing at home is also going to be an advantage for Celtic, who should easily wrap up the league title in the coming weeks.