
Maria Sakkari defeated Naomi Osaka 6-4 6-2 in the United Cup round robin on hard. The upset overturned the form book — Naomi Osaka came in ranked #13, leading the head-to-head 3–2. Maria Sakkari narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-03-22 | Miami | QF | hard | Maria Sakkari | 6-0 6-4 |
| 2020-01-06 | Brisbane | R32 | hard | Naomi Osaka | 6-2 6-7(4) 6-3 |
| 2019-06-17 | Birmingham | R32 | grass | Naomi Osaka | 6-1 4-6 6-3 |
| 2018-08-13 | Cincinnati | R64 | hard | Maria Sakkari | 6-3 7-6(8) |
| 2018-03-05 | Indian Wells | R16 | hard | Naomi Osaka | 6-1 5-7 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
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 (11 vs 7). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Sakkari M.: 1 day rest · 1 match, 19 games (7d) · Osaka N.: 7 days rest · 1 match, 23 games (7d). Higher means fresher. About