Yoon Jeong Cho defeated Gisela Dulko 6-4 6-3 in the US Open round of 64 on hard. The upset overturned the form book — Gisela Dulko came in defending last year's round of 64.
Jeong Cho Y. took it in straight sets.
Jeong Cho Y. and Dulko G. faced 2 of the same opponents in the last 12 months. Jeong Cho Y. went 1–1 (50%) against them, Dulko G. 2–0 (100%).
Only 2 common opponents — too few for any conclusion. Shown without assessment.