Valencia president Manuel Llorente insists no offers have arrived for Juan Mata.
Mata has been linked with Arsenal, Liverpool and Manchester City.
Llorente told Superdeporte: "Juan Mata is not for sale.
"We have no plans to sell and we have not received any formal offers for the player.
"The news that has appeared in the papers is nothing more than speculation.
"Our plan this summer is to make our squad better and our priority at the moment is to sign a central defender."
