Nadia Johnston defeated Riei Kawamata 6-2 6-3 in the Tampico 10K round of 16 on hard. The upset overturned the form book — Riei Kawamata came in leading the head-to-head 2–1. Nadia Johnston narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2001-03-05 | Australia Circuit 4 40K | R32 | grass | Nadia Johnston | 6-3 6-2 |
| 2000-03-04 | Victoria 3 10K | QF | grass | Riei Kawamata | 7-6 6-3 |
| 1999-06-21 | Montreal 10K | QF | hard | Riei Kawamata | 6-1 7-5 |