Yong Il Yoon defeated Takahiro Terachi 3-6 7-5 7-6 in the Japan F4 semi-final on carpet. The result followed the form book — Yong Il Yoon came in leading the head-to-head 1–0. Yong Il Yoon extended the head-to-head to 2–0.
Yoon Y. came through in three sets.
Yong Il Yoon beat Takahiro Terachi 3-6 7-5 7-6. Umpiry, "Yong Il Yoon vs Takahiro Terachi — Japan F4 Semi-final", https://umpiry.com/match/1998-10-07/terachi-vs-yoon-japan-f4-sf?utm_source=cite (as of 7 October 1998).