Yasufumi Yamamoto defeated Tasuku Iwami 6-3 6-3 in the Japan Masters 4 round of 16 on hard. The result followed the form book — Yasufumi Yamamoto came in leading the head-to-head 3–0. Yasufumi Yamamoto extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-18 | Japan F5 | R16 | carpet | Yasufumi Yamamoto | 6-4 7-6 |
| 1998-09-30 | Japan F3 | QF | carpet | Yasufumi Yamamoto | 6-3 4-6 6-4 |
| 1997-11-17 | Japan 2 Masters 4 | R16 | hard | Yasufumi Yamamoto | 0-6 6-1 7-6 |
Averages over each player's completed matches in the selected window (2 vs 4). 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