Sir Alex Ferguson may have to look elsewhere for goalscoring reinforcements this summer after being told Schalke striker Klass-Jan Huntelaar is not for sale.
The Netherlands international has netted 48 goals in 47 appearances for Schalke since joining the club from AC Milan in 2010 and was the top scorer in the Bundesliga last season.
Huntelaar has frequently been linked with a move to Old Trafford as Ferguson makes plans for the summer transfer window, while Stamford Bridge has also been reported as a potential destination.
However, Schalke are not even considering selling their prized asset and will strive to tie the 28-year-old down to a long-term contract to ward off any potential suitors.
"Klaas-Jan Huntelaar is still under contract with our club," Schalke boss Horst Heldt told German newspaper Reviersport.
"He is pretty much aware that we are very keen to prolong his contract and as far as I know he is also keen to do so."
Manchester United have already dipped into the German transfer market after adding Japan international Shinji Kagawa to their ranks earlier this month.
Kagawa performed to distinction as Borussia Dortmund claimed a maiden league and cup double last season, scoring 17 goals and contributing 13 assists over the course of the campaign.
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