Susan Cowan defeated Mareze Joubert 5-7 6-2 7-5 in the Warrnambool 4 10K quarter-final on grass. The upset overturned the form book — Mareze Joubert came in leading the head-to-head 2–1. Susan Cowan narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-02-27 | Warrnambool 1 10K | QF | grass | Susan Cowan | 6-4 2-6 6-3 |
| 1999-02-27 | Warrnambool 2 10K | QF | grass | Mareze Joubert | 6-1 6-0 |
| 1999-02-27 | Warrnambool 3 10K | R16 | grass | Mareze Joubert | 6-1 7-6 |