Nyorai kuenderera mberi kweiyi ndima - Muna Kubvumbi 2005, akaenda kuMadrid kunokwikwidza mu2005 World Taekwondo Championships
, achiisa yechipfumbamwe. Makore matatu gare gare, akahwina nzvimbo yechipiri kuDutch Open, iyo yakamupa mukana wekutora chikamu muBeijing 2007 World Taekwondo Championships muchikamu che flyweight (-58 kg). Ikoko, Pérez akawana menduru yesirivha, achirasikirwa naJuan Antonio Ramos weSpain mumutambo wokupedzisira.