Manchester United have been warned that transfer target Krepin Diatta will not come cheap by Sarpsborg sporting director Thomas Berntsen.
The 18-year-old has been tipped as a rising star of world football and a potential move to Old Trafford has been reported.
The Senegal Under-20 international midfielder has been impressing in Norway for Sarpsborg and Manchester United are said to be scouting him.
However. Sarpsborg sporting director Berntsen is hoping that the club can keep hold of their prize asset until at least next summer.
"What I can say is that there are many big clubs that follow Diatta," Berntsen told Norwegian broadcaster TV 2.