
Naomi Osaka defeated Mari Osaka 6-4 7-6 in the Irapuato 25K round of 16 on hard. The upset overturned the form book — Mari Osaka came in leading the head-to-head 1–0, but Naomi Osaka had been the form player, winning 5 of their last 7 on hard. Naomi Osaka claimed a first win over Mari Osaka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-09-24 | Amelia Island FL 10K | SF | clay | Mari Osaka | 6-2 6-3 |
Averages over each player's completed matches in the selected window (199 vs 74). 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
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About