Newcastle will reportedly demand a Premier League record transfer fee for Alexander Isak.
The Telegraph claim the Magpies have put a £150million price tag on their star striker to fend off transfer interest in January.

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This would break the current Premier League record of £115m paid by Chelsea for Moises Caicedo.
This is the same figure that the Blues cited to Newcastle in the summer to fend off transfer interest.
Isak is currently the hottest striker in the top flight, scoring seven goals in his last five games.
Only Mohamed Salah [16]Erling Haaland [13]and Cole Palmer [12] have scored more than Isak’s 11 goals so far this season.
Newcastle are keen to keep the striker as there is great interest from their Premier League rivals.
Arsenal are the club most strongly linked with the Sweden international but are likely to shy away from that price tag.
The Pitch Prospect understands Newcastle is under selling pressure due to profit and sustainability constraints [PSR].
We reported earlier this month that the club was prepared to make offers for Bruno Guimaraes following Man City’s interest.
Isak is another valuable asset who could receive offers once the transfer window opens.
The Pitch Prospect presenter Henry Winter told Sunday Edition: “Where did they get the result from? Where do you get £150 million from? His contract runs for three years.

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“£150m is a nice round number but there are also problems with PSR, they went through that with Elliot Anderson.
“If it’s £150 million, where do the negotiations start? Arsenal should be interested because they need a center forward and their budget for a top striker is around 80 million. Where do you go with £150 million?
“Basically, I think Isak won’t go.”
Newcastle take on Manchester United at Old Trafford on December 30.