Toshiaki Sakai defeated Tasuku Iwami 6-2 4-6 6-2 in the Japan 2 Masters 4 round of 32 on hard. The upset overturned the form book — Tasuku Iwami came in leading the head-to-head 1–0. Toshiaki Sakai claimed a first win over Tasuku Iwami in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-08-05 | Korea Rep F4 | R16 | hard | Tasuku Iwami | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.