Borussia Dortmund insist clubs will be 'wasting their time' making offers for highly-rated midfielder Mario Gotze in the summer.
Gotze has been a prominent member of the Dortmund team this season and has been linked with a string of Europe's leading clubs.
The 18-year-old, who made his Germany debut earlier this term, is under contract with Dortmund for a further three seasons.
And chairman Hans-Joachim Watzke is adamant there is no prospect of Dortmund selling Gotze at the end of the campaign.
"I can say he is not for sale," he told Bild, before insisting the club would reject a €25million offer for a player who came through their system.
"Definitely. Mario has a contract with us until 2014 and he will remain in Dortmund for at least that period of time.
"Other clubs can forget making an offer for Mario, they would be wasting their time."