
Naomi Osaka defeated Kiki Bertens 6-4 6-2 in the Acapulco round of 32 on hard. The upset overturned the form book — Kiki Bertens came in defending last year's round of 16. Naomi Osaka extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-01-06 | Brisbane | QF | hard | Naomi Osaka | 6-3 3-6 6-3 |
| 2018-10-22 | Singapore | RR | hard | Kiki Bertens | 6-3 0-0 RET |
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
Averages over each player's completed matches in the selected window (196 vs 198). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Osaka N.: 5 days rest · 2 matches, 44 games (7d). Higher means fresher. About