Naoko Kijimuta defeated Ai Sugiyama 5-7 6-4 6-4 in the Strasbourg round of 16 on clay. The upset overturned the form book — Ai Sugiyama came in leading the head-to-head 1–0. Naoko Kijimuta claimed a first win over Ai Sugiyama in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-03-07 | Indian Wells | R64 | hard | Ai Sugiyama | 6-4 6-7 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.