Hyung Taik Lee defeated Yasufumi Yamamoto 6-1 6-0 in the Japan F1 qualifying round on clay. The upset overturned the form book — Yasufumi Yamamoto came in leading the head-to-head 1–0. Hyung Taik Lee claimed a first win over Yasufumi Yamamoto in two meetings, levelling the head-to-head at 1–1.
Taik Lee H. took it in straight sets.
Clay: Taik Lee H. leads 1–0 · Hard: Yamamoto Y. leads 1–0
Hyung Taik Lee beat Yasufumi Yamamoto 6-1 6-0. Umpiry, "Hyung Taik Lee vs Yasufumi Yamamoto — Japan F1 Qualifying Round", https://umpiry.com/match/1999-03-17/lee-vs-yamamoto-japan-f1-qf?utm_source=cite (as of 17 March 1999).