[2] During his career, he played for RBC Roosendaal, Sparta Rotterdam, Utrecht, ADO Den Haag,[3] and RKVV Westlandia in the Netherlands after starting his career in his native France with Choisy Le Roi, ES Viry-Châtillon, and Clermont Foot.

Born in Athis-Mons, Essonne, Duplan began his career at Choisy-le-Roi before gaining recognition at Clermont Foot.

During his early amateur years, he studied philosophy at Lycée Marcel Pagnol Athis-Mons.

[4][5] In 2006, he moved to Dutch club RBC Roosendaal,[6] where he quickly became a fan favourite, leading to a transfer to Sparta Rotterdam in 2007.

This biographical article related to association football in France, about a midfielder born in the 1980s, is a stub.