

Donna Vekic defeated Maria Sakkari 7-6 6-1 in the San Diego round of 32 on hard. The upset overturned the form book — Maria Sakkari came in ranked #32. Donna Vekic extended the head-to-head to 6–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-08-18 | Monterrey | R32 | hard | Donna Vekic | 6-2 6-3 |
| 2024-04-22 | Madrid | R64 | clay | Maria Sakkari | 6-3 6-2 |
| 2023-06-19 | Berlin | SF | grass | Donna Vekic | 6-4 7-6 |
| 2023-02-06 | Linz | QF | hard | Maria Sakkari | 6-3 7-6 |
| 2020-01-13 | Adelaide | R16 | hard | Donna Vekic | 2-6 7-5 6-1 |
| 2018-10-01 | Beijing | R64 | hard | Donna Vekic | 6-1 6-4 |
| 2018-03-05 | Indian Wells | R128 | hard | Maria Sakkari | 6-4 6-2 |
| 2017-06-12 | Nottingham | QF | grass | Donna Vekic | 6-2 6-3 |
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
Vekic D.: 3 days rest · 2 matches, 52 games (7d) · Sakkari M.: 2 days rest · 2 matches, 51 games (7d). Higher means fresher. About
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