Conchita Martinez defeated Naoko Sawamatsu 6-1 6-2 in the US Open round of 32 on hard. The result followed the form book — Conchita Martinez came in defending last year's round of 32. Conchita Martinez extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-03-19 | Key Biscayne | R32 | hard | Conchita Martinez | 6-2 6-2 |
| 1997-09-15 | Tokyo | QF | hard | Naoko Sawamatsu | 7-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.