Schalke chief Christian Heidel insists they're under no pressure to sell their best players.
Young German attacking midfielder has been linked with Liverpool and Tottenham this season.
Heidel has denied reports they must sell to balance the books.
"It must be a bit slimmed down everywhere. But certainly not by selling players. This is not necessary," said Heidel.
"There is also a certain number of contracts. My job must be that it fits financially then. No more, no less."