Ai Sugiyama defeated Sylvia Plischke 6-4 6-1 in the Roland Garros round of 32 on clay. The upset overturned the form book — Sylvia Plischke came in leading the head-to-head 1–0, defending last year's quarter-final. Ai Sugiyama claimed a first win over Sylvia Plischke in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-22 | Wimbledon | R128 | grass | Sylvia Plischke | 6-4 6-7 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.