Feyenoord is interested in signing Maas Willemsen, a 22-year-old defender from De Graafschap. They plan to follow a similar path as with Devin Haen, by signing him and then loaning him to their satellite club, FC Dordrecht. Willemsen has an expiring contract with De Graafschap and is currently experiencing a breakthrough season. Currently, Transfermarkt estimates his market worth at 200k euros.