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Arsenal have already completed the signing of Sead Kolasnic and Alexandre Lacazette this summer transfer window.
The Gunners have already completed the transfer of Chris Willock and Kaylen Hinds have been allowed to join Benfica and Wolfsburg respectively.
The Daily Mail says Crowley will have a medical at Willem II ahead of a permanent return to the Dutch Eredivisie.
Arsenal teen Crowley will sign a three-year deal as he searches for more regular football for a fee based heavily on his success.
The 19-year-old midfielder made a good impression in Holland during a six-month spell with Go Ahead Eagles despite relegation.
Arsene Wenger is a big admirer of Crowley’s ability but with only a year left on his Arsenal contract, he was determined to leave and develop his career.
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