Yoon Jeong Cho defeated Magui Serna 6-3 6-4 in the US Open round of 128 on hard. The upset overturned the form book — Magui Serna came in leading the head-to-head 1–0, defending last year's round of 128. Yoon Jeong Cho claimed a first win over Magui Serna in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-25 | US Open | R128 | hard | Magui Serna | 3-6 6-2 6-1 |
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 (15 vs 16). ATP, WTA & Challenger.