Reports suggest that the Gunners will look to make a £8million move for the Portuguese-born Holland international in January.
"He is very good and strong. It is not for nothing he's a first-choice here and with the Dutch national team. He will make the move to a foreign club in the long term," the ex-Gunners ace said.
"When the time comes and he wants to leave, he will leave the club. We are very happy with him, but we know we cannot compete with the top European clubs."
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