Yasufumi Yamamoto defeated Satoshi Iwabuchi 6-4 1-6 7-5 in the Japan F1 round of 32 on clay. The upset overturned the form book — Satoshi Iwabuchi came in leading the head-to-head 2–0. Yasufumi Yamamoto claimed a first win over Satoshi Iwabuchi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-12 | Japan F3 | QF | hard | Satoshi Iwabuchi | 6-1 6-1 |
| 1996-06-09 | Japan 1 Masters 2 | QF | hard | Satoshi Iwabuchi | 6-4 6-3 |
Averages over each player's completed matches in the selected window (1 vs 14). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About