Keiko Ishida defeated Nikola Hubnerova 6-3 6-3 in the San Antonio 10K r31 on hard. The upset overturned the form book — Nikola Hubnerova came in leading the head-to-head 1–0, but Keiko Ishida had been the form player, winning 4 of their last 6 on hard. Keiko Ishida claimed a first win over Nikola Hubnerova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-11 | Miami 10K | R32 | hard | Nikola Hubnerova | 6-2 7-6 |