For WBC light-flyweight title · 12 rounds

Isidro
Pérez
VS
Chang
Jung-koo

Jung-koo · UD 12/12

Dec 13, 1987 · Chungmu Gymnasium, Daejeon, 🇰🇷

Pérez going in47-3-3

Jung-koo going in34-1-0

Confirmation✓✓ two sources

MethodUD

Round12 of 12

TitleFor WBC light-flyweight title

Sources

English Wikipedia
side a · observed 2026-10-11
en.wikipedia.org/wiki/Isidro_Pérez

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English Wikipedia
side b · observed 2026-10-11
en.wikipedia.org/wiki/Chang_Jung-koo

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