Yong Il Yoon defeated Jae Sik Kim 6-3 7-6 in the Korea Masters 3 round of 16 on clay. The upset overturned the form book — Jae Sik Kim came in leading the head-to-head 1–0. Yong Il Yoon claimed a first win over Jae Sik Kim in two meetings, levelling the head-to-head at 1–1.
Yoon Y. took it in straight sets.
Clay: Yoon Y. leads 1–0 · Hard: Sik Kim J. leads 1–0
Yong Il Yoon beat Jae Sik Kim 6-3 7-6. Umpiry, "Yong Il Yoon vs Jae Sik Kim — Korea Masters 3 Round of 16", https://umpiry.com/match/1997-05-24/kim-vs-yoon-korea-masters-3-r16?utm_source=cite (as of 24 May 1997).