Guillaume Graechen

Guillaume Graechen (born 24 April 1977), also known as Doan Guillaume Duong, is a French-born Vietnamese football manager and former football player. He started his career as a football player at Dijon and played in France until 2007. That year, while working as a football scout for Jean-Marc Guillou, he was introduced by Arsène Wenger to the owner of Hoang Anh Gia Lai FC who was recruiting a manager for his new academy. As a coach, he has helped many Vietnamese football players advance their careers.