Mariana Diaz Oliva defeated Adriana Gersi 7-5 6-3 in the Sopot round of 16 on clay. The upset overturned the form book — Adriana Gersi came in defending last year's round of 32. Mariana Diaz Oliva extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2001-01-15 | Australian Open | R128 | hard | Mariana Diaz Oliva | 6-4 5-7 6-4 |
| 1997-05-05 | Rome | R64 | clay | Adriana Gersi | 7-5 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.