Melanie Marois defeated Mayumi Yamamoto 4-6 6-2 6-2 in the Hilton Head SC 10K round of 32 on hard. The upset overturned the form book — Mayumi Yamamoto came in leading the head-to-head 1–0. Melanie Marois claimed a first win over Mayumi Yamamoto in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-06-16 | Dallas TX 10K | R16 | hard | Mayumi Yamamoto | 6-4 7-5 |