Celtic are reported to have put a 30m euro price tag on Kris Ajer.
The defender has been the subject of speculation over the last few months with regular spikes of interest.
At the end of last season Ajer switched agency but the speculation has remained, today Tuttosport reported;
Celtic, for example, does not sit down to deal with Kristoffer Ajer for less than 30 million which makes him out of budget for Milan.
Deila was signed in the closing months of Ronny Deila’s time in charge of Celtic but never got to play under his fellow Norwegian.
Brendan Rodgers quickly switched the then teenager from midfield to centre-half with a loan spell at Kilmarnock giving him the experience needed for the Scottish game.
Halfway through the 2017/18 season Ajer started to make inroads into the Celtic first team, signing a four year contract shortly before appearing in the Scottish Cup Final win over Motherwell.
Last season his partnership alongside Chris Jullien was one of the main features in Celtic’s title success, with Jozo Simunovic released at the end of his contract selling the Norwegian would leave Celtic seriously short of options in central defence.