Nadejda Ostrovskaya defeated Natalia Gussoni 6-2 6-3 in the Australian Open qualifying round of 128 on hard. The upset overturned the form book — Natalia Gussoni came in leading the head-to-head 1–0. Nadejda Ostrovskaya claimed a first win over Natalia Gussoni in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-09-08 | Turin 25K | R16 | clay | Natalia Gussoni | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.