Naoko Sawamatsu defeated Mirjana Lucic 6-2 4-6 6-3 in the Indian Wells round of 64 on hard. The upset overturned the form book — Mirjana Lucic came in leading the head-to-head 2–0. Naoko Sawamatsu claimed a first win over Mirjana Lucic in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-31 | US Open | R64 | hard | Mirjana Lucic | 4-6 6-1 6-1 |
| 1998-04-25 | Fed Cup WG2 QF: CRO vs JPN | RR | clay | Mirjana Lucic | 6-3 7-6(5) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.