Sandy Gumulya defeated Ling Zhang 6-3 6-1 in the Jakarta 10K round of 16 on hard. The upset overturned the form book — Ling Zhang came in leading the head-to-head 1–0, but Sandy Gumulya had been the form player, winning 7 of their last 10 on hard. Sandy Gumulya claimed a first win over Ling Zhang in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-03-09 | North Shore City 10K | SF | hard | Ling Zhang | 7-5 6-2 |
Averages over each player's completed matches in the selected window (2 vs 56). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About