NEW Celtic signing Kristoffer Ajer is at the centre of a sportsmanship storm in Norway after the Rosenborg boss slaughtered him for trying to get players booked and sent off.

But the unrepentant 18-year-old insists he has no intention of changing his ways when he moves to Scotland in the summer.

Ajer has agreed a £750,000 switch to the Scottish champions, but will be under new management when he arrives after countryman Ronny Deila decided to quit.

He has just four games left in Norway before moving to Glasgow, but his conduct has been slammed by their manager Kare Ingebrigtsen.

Ingebrigtsen wasn't happy that Ajer was complaining to the referee his players should be booked and sent off for heavy challenges.

And he's advised Ajer not to do that in Scotland.

He pointed out: "I am surprised that at 18 years of age, Ajer runs about shouting that everyone should be booked.

"That surprised me. He complained that it should have been another booking after a small challenge from Jonas Svensson.

"If he starts that in Scotland, I think he will struggle.

"He was whining to the ref about people getting yellow cards. It's not his job to do that.

"I wouldn't even expect some of the more experienced Start players to do that.

"He needs to stop that in Scotland.

"Look, he's a good player and has everything in his game to be a success and I wish him good luck.

"But remember, he has a new coach to impress now."

But Ajer was unapologetic after the game, which Rosenborg won 2-0 to continue Start's miserable start to the Norwegian season as they remained anchored to the bottom of the league.

He said: "There were two tackles I complained about and I thought they should have been yellow cards, it was that simple.

"Both teams do that in the heat of the battle. If obviously affects the game if the opposition get a player sent off.

"It's not unsportsmanlike. I'm not going to stop doing that when I'm going to Scotland. All 22 players do it all the time and I'll always do it too.. It's part of football."