Katerina Siniakova defeated Rebecca Peterson 6-3 3-6 6-1 in the Bastad round of 32 on clay. The upset overturned the form book — Rebecca Peterson came in leading the head-to-head 2–0, defending last year's round of 32. Katerina Siniakova claimed a first win over Rebecca Peterson in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-08-13 | Cincinnati | R64 | hard | Rebecca Peterson | 2-6 6-4 6-1 |
| 2015-07-13 | Bastad | R16 | clay | Rebecca Peterson | 7-5 7-6(6) |
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 clay 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
Siniakova K.: 9 days rest · 2 matches (14d). Higher means fresher. About