Cika wannan jumla: A watan Afrilu 2005, ya tafi Madrid don yin gasa a gasar
Gasar Taekwondo ta Duniya ta 2005, ta zama ta tara. Shekaru uku bayan haka, ya lashe matsayi na biyu a Dutch Open, wanda ya ba shi damar shiga gasar cin kofin Taekwondo ta duniya ta Beijing 2007 a cikin nauyin tashi (-58 kg). A can, Pérez ya lashe lambar azurfa, ya yi rashin nasara ga Juan Antonio Ramos na Spain a wasan karshe.