Mareze Joubert defeated Susan Cowan 6-1 7-6 in the Warrnambool 3 10K round of 16 on grass. The upset overturned the form book — Susan Cowan came in leading the head-to-head 2–1, but Mareze Joubert had been the form player, winning 7 of their last 10 on grass. Mareze Joubert 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 4 10K | QF | grass | Susan Cowan | 5-7 6-2 7-5 |