Christian Eriksen, who has been linked with Barcelona and Manchester United, should stay at Ajax for another five years, according to manager Frank De Boer.
The 20-year-old is fast emerging as one of the most sought-after young players in Europe, with Chelsea, Liverpool and Manchester City also believed to be keen on signing the Denmark international.
And although Eriksen is believed to be keen on a move to a bigger club, De Boer has urged him to remain with the Dutch club for a few more years.
"Christian is a smart kid," he was quoted by the Daily Mirror as saying.
"Of course maybe he will play for a big team like Manchester United in the future. But I think he wants to show what he is capable of in this kind of team.
"It would be better for him to stay until he was 25 because you learn a lot in the Netherlands.
"If you leave afterwards you are a more stable player and ready to play in the big leagues."
Eriksen revealed at the end of last year that he is interested in joining Barcelona, while reports in Spain had suggested his agent, Martin Schoots, recently held talks with the Catalans to discuss the player's situation in Amsterdam.
United's interest has already been confirmed, with assistant coach Rene Meulensteen recently revealing that the club are keeping tabs on the youngster.