Chiaki Okadaue defeated Nungnadda Wannasuk 6-2 6-2 in the Sorrento 25K round of 32 on hard. The upset overturned the form book — Nungnadda Wannasuk came in leading the head-to-head 3–0. Chiaki Okadaue claimed a first win over Nungnadda Wannasuk in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-10-03 | Palembang 25K | R32 | hard | Nungnadda Wannasuk | 6-2 6-0 |
| 2011-07-04 | Pattaya 25K | R32 | hard | Nungnadda Wannasuk | 6-3 7-5 |
| 2010-07-19 | Nonthaburi 25K | R16 | hard | Nungnadda Wannasuk | 6-1 6-0 |
Averages over each player's completed matches in the selected window (2 vs 3). 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. About