PSV Eindoven technical director John de Jong says the club is yet to receive a concrete offer for
Madueke has been linked with a number of clubs including Borussia Dortmund and AC Milan.
The 19-year-old scored seven goals in 24 league appearances for the Farmers last season.
De Jong insists they are yet to receive a firm offer for the player and would rather not sell him.
“At the moment we have not yet received a concrete offer, but obviously everything can change quickly,” he told Voetbal International.
“In principle, he should not leave the club, but something crazy can always happen in the transfer market even if our preference would be to keep him here.”