FORMER Celtic defender Vidar Riseth insists Celtic should be holding out for £30million before they make the decision to sell Kristoffer Ajer.

The Norwegian stopper has been linked with a move to Italian giants AC Milan this summer, but he is under contract at Parkhead until 2022.

Riseth, who is friends with Ajer, is adament that the Hoops should be holding out for as much as possible as he belives the Dane is a top talent.

Speaking to the Daily Record, he said: “Kris is a modern centre-back, he’s young and has a lot of potential.

“The money clubs will pay for these kinds of players is crazy right now.

“We are talking £50m and more now in that transfer market.

“When the time comes for Kris to go, I think Celtic will be able to demand £20m – maybe even £30m.

“That’s the level we are talking about now.

“Kris is still only 22 and already has a lot of experience. He has played in Europe and he has been captain of Norway.

“That kind of quality comes at a cost.

“We will see but I believe he will stay at Celtic.”