Barcelona and Tottenham are likely to renew their interest in De Jong and though the player recently hinted he sees his future away from Ajax, it seems unlikely he will be leaving before the end of the season.
According to OK Diario, European champions Madrid are now firmly in the race for De Jong, who made 26 appearances for Ajax during the 2017-18 campaign.
"Barcelona can return in January if they want, but no player will leave", he is quoted as saying by AS. The midfielder has put up a great performance to help Ajax to qualify for the Champions League this season.
During the last summer transfer, Barcelona were said to have had their bid turned down by Ajax chiefs, although the Catalan giants will still go again when the January transfer window opens.
But Overmars said Barcelona might come with a big offer to get De Jong in their squad in the winter transfer window.
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The report from Sport analyses Barcelona's interest in de Jong, revealing that he is seen as a potential successor to Sergio Busquets in the heart of the midfield.
De Jong began his career with Willem II Tilburg in 2015, making his debut against FC Den Haag in May of that year.
De Jong made his worldwide debut for Netherlands on Thursday in a friendly against Peru and then went on to feature in the UEFA Nations League encounter against France at the weekend.
He added: "He is doing very well now, but we have often had Dutch players who first played very well, but later became less".
De Jong is under contract at Ajax until 2022, so any bid would have to be astronomical to be accepted.