During the summer of the 2014–15 season, Feyenoord lost four of its best players: Daryl Janmaat to Newcastle United, Stefan de Vrij to Lazio, Bruno Martins Indi to Porto and Graziano Pellè to Southampton, with Southampton having just appointed Koeman as its new manager. To replace them, as well as other departed players, Feyenoord signed Warner Hahn from Dordrecht, Luke Wilkshire from Dynamo Moscow, Khalid Boulahrouz from Brøndby, Bilal Başaçıkoğlu from Heerenveen, Colin Kazim-Richards from Bursaspor, Jens Toornstra from Utrecht, Kenneth Vermeer from Ajax and Karim El Ahmadi from Aston Villa, returning to the club after two years in England.