Former England boss Steve McClaren has warned Mike Ashley he must cough up “stupid money” if he is to sign Luuk de Jong.
The FC Twente boss has told his board that he wants to include the Swiss-born centre-forward in his plans for next season.
FC Twente are also joining Newcastle in the Europa League.
McClaren says the player is not experienced enough at playing striker to be a success in the Premiership.
McClaren: “Luuk de Jong would stay if it were up to me – unless stupid money is offered.
“The club know what I think about it.
“Only since last winter has Luuk been playing as a number 9.
"He must have at least one full season playing as a striker to become a top player at a big club.”
McClaren is already resigned to losing 6ft 4in defender Douglas this summer.
The Brazilian-born stopper was fined by McClaren this month for failing to turn up for training on time.
The defender had been visiting his mother, who had underwent an operation, however he failed to contact the club to tell them he needed more time.