Ajax coach Frank de Boer retains hope of keeping hold of Jasper Cillessen.
The Ajax keeper continues to be linked with Manchester United as a replacement for David de Gea - should he be sold to Real Madrid.
However, De Boer is hopeful of keeping hold of his No1.
"I hope he stays, but anything can happen in the final week of the transfer period.
"As time goes Jasper rises in price," said De Boer.