Manchester United assistant manager Mike Phelan has indicated the club are watching Sporting Lisbon striker Ricky van Wolfswinkel.
United have been linked with a move for the young Dutchman after a string of great performances at Sporting this season.
The 22-year-old, who joined from Dutch side Utrecht in the summer for £5.5 million, has scored six goals in his first eight games.
This form has alerted clubs from all across Europe. He is now reportedly valued at £11 million
A host of clubs were credited with an interest in van Wolfswinkel prior to his move to Sporting. Phelan has revealed they are long-term admirers of the Dutch international.
"We have obviously known van Wolfswinkel for a long time," Phelan told Portuguese newspaper Record. "He is a young striker, very talented, who has been growing in the last few seasons."
"A club like Manchester United
carefully follow many players all over the world."