Giuseppe Rossi's agent has claimed that Barcelona - along with a number of other top European clubs - are showing a keen interest in the Manchester United youngster.
The Italian Under 21 international failed to shine at Newcastle during the first half of the season, but scored on his Parma debut on Sunday after moving to Serie A on loan to underline his credentials as a talented prospect.
Rossi is highly-rated within the halls of Old Trafford but now Sir Alex Ferguson's plans to make the New Jersey-born striker a key figure in his future plans could be under threat following the news that Internazionale, Milan, Juventus and Roma have all enquired about his availability.
Agent Andrea Pastorello has revealed that United knocked back an offer for the forward in the summer, as well as confirming that European Champions Barcelona are keen admirers of the player who had been linked with a further loan move to Sunderland.
"We have had contact with Barcelona," Pastorello is quoted in the Guardian.
"But I repeat that it will not be easy to take him away from Manchester United.
"They've already said no to £4.2million, which is no small fee by today's standards.
"They have great faith in Giuseppe and turned down a £4.2million bid before the season started.
"I'm grateful to United and we will never clash. But in terms of his characteristics, I think Rossi is more suited to the Italian game and that's why we rejected a loan to another English club [after his spell at Newcastle].
"He is at Parma now and he has a chance to shine."