Pedzisa mutsara unotevera: Muna April 2005, akaenda kuMadrid kunokwikwidza mu
2005 World Taekwondo Championships, achiisa wechipfumbamwe. 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.