Tathiana Garbin defeated Amanda Hopmans 7-6 3-6 6-3 in the Estoril round of 32 on clay. The upset overturned the form book — Amanda Hopmans came in defending last year's round of 32, but Tathiana Garbin had been the form player, winning 3 of their last 4 on clay. Tathiana Garbin extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-11-30 | New Delhi 75K | F | hard | Tathiana Garbin | 6-3 6-2 |
| 1998-06-30 | Orbetello 25K | R32 | clay | Amanda Hopmans | 6-7 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.