Kimberly Birrell vs Petra Marcinko — US Open Round of 128
Birrell K.
Kimberly Birrell faces Petra Marcinko in the US Open round of 128 on hard. Kimberly Birrell holds the paper edge — ranked #69, defending last year's round of 128, a roughly 110-point hard Elo advantage. They have met 2 times, the series level at 1–1, Kimberly Birrell ahead 1–0 on hard.
Win Probability
Pre-match · updated 12:50 UTC50–58%
58–67%
67–80%
80%+
Toss-up · Too close to call
Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
Key context
- Under pressure: In the tight moments, Petra Marcinko has rated higher under pressure (Clutch Rating 72 vs 36).
- Serve & return: Kimberly Birrell brings the bigger serve (Serve Rating 35), Petra Marcinko the stronger return game (Return Rating 58).
- Head-to-head: The head-to-head is level 1–1, 1–0 on hard. Last met at Eastbourne 2026.
Common opponents
Last 12 monthsUmpiry Score
Pre-matchThe Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Statistics
This seasonAverages over each player's completed matches in the selected window (39 vs 34). ATP, WTA & Challenger.
Serve vs return
This seasonEach player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Clutch
Under pressurePerformance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Freshness
Recent loadBirrell K.: 3 days rest · 1 match, 22 games (7d) · Marcinko P.: 4 days rest · 1 match, 28 games (7d). Higher means fresher. About
Conditions
Head to head
1–1| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-06-24 | Eastbourne | R16 | grass | Petra Marcinko | 6-1 6-4 |
| 2026-02-23 | Austin | R32 | hard | Kimberly Birrell | 0-6 6-3 6-4 |