Ajax's head of youth development Wim Jonk has expressed his disappointment after 16-year-old striker Donyell Malen left the club to join Arsenal.
The youngster was offered a new deal by the Dutch side but he refused it to continue his development in North London.
"Donyell is a great talent," Jonk told the club's official website.
"It is extremely unfortunate that he is leaving Ajax.
"We have made him an excellent offer and presented a clear development plan but the player has still made another choice, which is disappointing.
"The potential is clear and the opportunities will come with Ajax. We are continuing with the guys who do believe in it."