Lisa Pigato vs Sloane Stephens prediction for May 21, 2026: Our Monte Carlo simulation ran 10,000 game iterations and projects Sloane Stephens 0 - Lisa Pigato 0. Sloane Stephens is favored with a 54.1% win probability.
Sloane Stephens
1617
Clay Elo
VS
Clay • WTA
Lisa Pigato
1453
Clay Elo
Match Win Probability
Sloane StephensLisa Pigato
Clay
Surface
WTA French Open
Tournament
10,000
Simulations
Calibrated accuracy at this confidence: 54.8% (2,644 games)
Match Context
Tournament
WTA French Open
Surface
Clay
Format
Best of 3 · WTA
Surface Elo Ratings (Clay)
Lisa Pigato
Sloane Stephens
Sloane Stephens leads by 165 Elo points on Clay
Serve & Return Analysis
Serve Points Won % (SPW) is the single most predictive metric in tennis. WTA average on Clay: 56.5%
Lisa Pigato SPW
58.1%
Above tour avg
Sloane Stephens SPW
59.0%
Above tour avg
● Serve statistics are nearly identical — expect a close match
Market Odds & Model Edge
Lisa Pigato ML
-147
Model: 46%
Edge: -13.6%
Sloane Stephens ML
+123
Model: 54%
Edge: +9.3%
Model Projection
Sloane Stephens ML +123 · +9.3% edge
Key Matchup Factors
- Sloane Stephens holds a commanding 165-point Elo advantage on Clay
- Clay surface reduces serve dominance — expect more breaks of serve and longer rallies
- Sloane Stephens has the stronger serve profile on this surface
Surface Elo v1.0 · Barnett-Clarke serve model · 10,000 simulations · WTA
Edge Analysis
Moneyline
Sloane Stephens 54.1%
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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. Full methodology →