Simona Waltert defeated Petra Marcinko 6-1 6-1 in the Australian Open qualifying round 1 on hard. The upset overturned the form book — Petra Marcinko came in ranked #72. Simona Waltert extended the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-08-13 | Cincinnati | R128 | hard | Simona Waltert | 5-7 6-4 6-2 |
| 2026-06-20 | Eastbourne | SF | grass | Petra Marcinko | 6-4 6-7 6-4 |
| 2024-05-14 | W75 Zagreb 1 | R32 | clay | Simona Waltert | 6-2 6-4 |
| 2024-01-09 | Australian Open | Q128 | hard | Simona Waltert | 6-1 6-1 |
Averages over each player's completed matches in the selected window (200 vs 192). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Waltert S.: 5 days rest · 2 matches, 47 games (7d) · Marcinko P.: 7 days rest · 1 match, 30 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