Petra Marcinko vs Madison Keys prediction for June 26, 2026: Our Monte Carlo simulation ran 10,000 game iterations and projects Madison Keys 0 - Petra Marcinko 0. Madison Keys is favored with a 60.9% win probability.
Madison Keys
1706
Grass Elo
VS
Grass • WTA
Petra Marcinko
1549
Grass Elo
Match Win Probability
Madison KeysPetra Marcinko
Grass
Surface
Eastbourne
Tournament
10,000
Simulations
Calibrated accuracy at this confidence: 56.2% (6,507 games)
Match Context
Tournament
Eastbourne
Surface
Grass
Format
Best of 3 · WTA
Surface Elo Ratings (Grass)
Petra Marcinko
Madison Keys
Madison Keys leads by 157 Elo points on Grass
Serve & Return Analysis
Serve Points Won % (SPW) is the single most predictive metric in tennis. WTA average on Grass: 56.5%
Petra Marcinko SPW
57.0%
Above tour avg
Madison Keys SPW
58.1%
Above tour avg
● Madison Keys has a slight serve edge (+1.2%)
Market Odds & Model Edge
Petra Marcinko ML
+386
Model: 39%
Edge: +18.5%
Madison Keys ML
-514
Model: 61%
Edge: -22.8%
Model Projection
Petra Marcinko ML +386 · +18.5% edge
Key Matchup Factors
- Madison Keys holds a commanding 157-point Elo advantage on Grass
- Grass surface amplifies serve advantage — expect fewer breaks, more tiebreaks
- Madison Keys has the stronger serve profile on this surface
Surface Elo v1.0 · Barnett-Clarke serve model · 10,000 simulations · WTA
Edge Analysis
Moneyline
Madison Keys 60.9%
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How this prediction was generated: This page shows output from the Olympus Bets ATP/WTA Tennis Monte Carlo engine. Each game is simulated 10,000 times using real-time team data, injury reports, and current odds. Probabilities are calibrated using Bayesian methods and sized via the Kelly Criterion. Probabilities are calibrated using Bayesian methods and sized via the Kelly Criterion. Full methodology →