

Maria Sakkari defeated Madison Keys 6-4 6-4 in the Australian Open round of 32 on hard. The upset overturned the form book — Madison Keys came in ranked #23, defending last year's round of 16. Maria Sakkari extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-07-31 | Washington | QF | hard | Maria Sakkari | 6-3 6-3 |
| 2022-04-28 | Madrid | R64 | clay | Maria Sakkari | 6-7(8) 6-3 6-4 |
| 2021-03-01 | Doha | R16 | hard | Maria Sakkari | 6-2 6-2 |
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 (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Sakkari M.: 9 days rest · 3 matches (14d) · Keys M.: 7 days rest · 1 match, 23 games (7d). Higher means fresher. About