 In January 2003 he was sold to Mexican club Querétaro F.C.for US$1,200,000 but, in the transfer agreement, it was established that the player would stay with Vélez until the end of the season.However, after a good last months as Vélez's captain, Fuentes' value increased, and he was immediately sold by Querétaro to En Avant Guingamp for US$2,000,000, before having playing any official game in Mexico.