Gisela Dulko defeated Alona Bondarenko 6-4 6-0 in the US Open round of 64 on hard. The upset overturned the form book — Alona Bondarenko came in leading the head-to-head 3–2, defending last year's round of 32. Gisela Dulko narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-03-22 | Miami | R64 | hard | Gisela Dulko | 7-5 6-2 |
| 2007-08-27 | US Open | R128 | hard | Alona Bondarenko | 6-4 6-3 |
| 2007-04-02 | Amelia Island | R64 | clay | Alona Bondarenko | 6-2 6-3 |
| 2006-04-03 | Amelia Island | R64 | clay | Alona Bondarenko | 6-0 6-1 |
| 2005-04-25 | Estoril | R16 | clay | Gisela Dulko | 6-2 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (115 vs 107). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About