Satoshi Iwabuchi defeated Yaoki Ishii 6-4 6-1 in the Japan F5 qualifying round on hard. The upset overturned the form book — Yaoki Ishii came in leading the head-to-head 1–0. Satoshi Iwabuchi claimed a first win over Yaoki Ishii in two meetings, levelling the head-to-head at 1–1.
Iwabuchi S. took it in straight sets.
Hard: Iwabuchi S. leads 1–0 · Carpet: Ishii Y. leads 1–0
Satoshi Iwabuchi beat Yaoki Ishii 6-4 6-1. Umpiry, "Satoshi Iwabuchi vs Yaoki Ishii — Japan F5 Qualifying Round", https://umpiry.com/match/2001-05-21/ishii-vs-iwabuchi-japan-f5-qf?utm_source=cite (as of 21 May 2001).