Mirjana Lucic defeated Naoko Sawamatsu 4-6 6-1 6-1 in the US Open round of 64 on hard. Mirjana Lucic extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-04-25 | Fed Cup WG2 QF: CRO vs JPN | RR | clay | Mirjana Lucic | 6-3 7-6(5) |
| 1998-03-05 | Indian Wells | R64 | hard | Naoko Sawamatsu | 6-2 4-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.