Swansea City have completed the signing of central defender Mike van der Hoorn from Ajax on a three-year contract.
The 23-year-old started his career at FC Utrecht before moving to Eredivisie rivals Ajax in July 2013.
He was called up to the Netherlands senior squad in 2013, having played for his country at Under-21 level.
Van der Hoorn is Swansea’s second signing of the summer after fellow Dutchman Leroy Fer joined from QPR in a permanent deal.
Fer, 26, made nine appearances on loan with the Swans during the 2015-16 season.