In 2005, at the Valencia tournament, Dupuis became the first French player to defeat Novak Djokovic. In 2006 he tested positive for the banned drug Salbutamol and was suspended for two and a half months.
In 2005, at the Valencia tournament, Dupuis became the first French player to defeat Novak Djokovic. In 2006 he tested positive for the banned substance Salbutamol and was suspended for two and a half months.