Estimated outcome probability. A likely winner can still be overpriced.
← Decision briefsTennis · Oct 15, 8:05 PM PDT YOUR RESEARCH TASK FORECASTDiana Shnaider RELIABILITY4/4 model reports MARKET VALUENot established Current TORK63.0% Simple average63.0% Calibrated average64.2% Kalshi68.0% Inspect the methods and progress →
Jelena Ostapenko vs Diana Shnaider
63.0%Diana Shnaider
LOCKED Oct 15, 7:31 PM PDT4/4 independent models select Diana Shnaider; all four oriented probabilities average 63%.
Review official results
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- Read the original forecast before the outcome.
- Check the recorded official result and source context.
- Record a lesson without treating one result as proof.
21 reported evidence limits. Agreement alone does not establish accuracy.
A probability difference alone does not account for forecast error, fees, spread, or available liquidity.
Why the models lean this way
These are reasons recorded by the models. They are not independently verified facts or measured causes of a probability change.
- Grok: Higher current ranking (13 vs 34)
- Gemini: Diana Shnaider's higher WTA rank (13 vs 34)
- Claude: Ranking gap: Shnaider No. 13 vs Ostapenko No. 34
- GPT: Shnaider is ranked No. 13 versus Ostapenko at No. 34.
Read all four model reports
Grok · Diana Shnaider · 65.0%
Diana Shnaider holds rank 13 with 2643 points and a 29-20 singles record, clearly ahead of Jelena Ostapenko at rank 34 with 1527 points and 23-20 record. Surface form, injuries, head-to-head, travel, and market odds are unavailable as they are not supplied in the evidence package. The ranking and season record differential supports a 65% win probability for Shnaider.
xai/grok-4.3 · Oct 15, 5:01 PM PDTGemini · Diana Shnaider · 63.0%
Diana Shnaider holds a significant ranking advantage over Jelena Ostapenko (13 vs 34) and has accumulated substantially more ranking points (2643 vs 1527). Furthermore, Shnaider has a better season win-loss record (29-20) compared to Ostapenko (23-20). Based on these metrics, Shnaider is the statistical favorite. However, surface form, injuries, head-to-head, travel, and market odds are unavailable, limiting the precision of this forecast.
google/gemini-3.1-pro-preview · Oct 15, 5:00 PM PDTClaude · Diana Shnaider · 60.0%
Only rankings and season win-loss are supplied. Shnaider is ranked 13 (2,643 points) versus Ostapenko at 34 (1,527 points), a gap of roughly 21 places and ~1,100 points, and she holds the better season record (29-20, .592 vs 23-20, .535). Both are trending similarly in ranking movement (Shnaider 14->13, Ostapenko 32->34) and neither has a title this season, so the signal is modest rather than decisive. Ranking gaps of this size in a WTA 1000 quarterfinal typically translate to roughly a 58-63% edge. Surface-specific form, injury/fitness status, head-to-head history, travel/scheduling load, and market odds are all unavailable, so this estimate is deliberately conservative and close to the ranking-implied baseline.
anthropic/claude-opus-5 · Oct 15, 5:00 PM PDTGPT · Diana Shnaider · 64.0%
Using only the supplied immutable evidence, Diana Shnaider has the stronger pre-match profile. She is ranked significantly higher than Jelena Ostapenko (No. 13 vs No. 34), has substantially more ranking points (2643 vs 1527), and owns the better 2026 singles record (29-20 vs 23-20). Both players have zero singles titles listed, so that factor is neutral. This points to Shnaider as the more likely winner, though not overwhelmingly so because the evidence package is limited to ranking and overall season record only. Surface form, injuries, head-to-head, travel, and market odds are unavailable when absent, which caps certainty.
openai/gpt-5.4 · Oct 15, 5:00 PM PDTWhat remains uncertain
- Surface-specific form not available
- Head-to-head data absent
- Injuries not provided
- Travel and market odds unavailable
- Surface-specific form is not supplied
- Injury reports are unavailable
- Head-to-head records are not provided
- Travel fatigue factors are unknown
What to watch next
Official result recorded. Review the original forecast and sources below.
Open the event and source context →What changed before the lock
- 0.8 percentage points higher for Diana Shnaider
The pre-event probability state was locked atomically and is immutable.
Record hash
a7e9aae039bdf350ec4f670c76846e78fc608f3a9ac593cf33ae6c75b0a83697 - First recorded forecast
First prospective probability state captured for this source and competition.
Record hash
41f50a5ad3bb93c9e813e099b924a0245c5f3706af18c9191b2855a8bec1bb7d
Reasons are shown as they were recorded. The ledger does not establish that a specific fact caused a probability change.
The saved method comparison
All probabilities below refer to Diana Shnaider. Model inputs were fixed at Oct 15, 7:31 PM PDT. The market was observed at Oct 15, 7:30 PM PDT.
Comparison record
Saved Oct 15, 7:35 PM PDT. This is a research comparison; no method has been promoted.
ebabe0b74b6605712a4d8021c9e608d7b3557356faff7e99fe1bbe08704f2f49Available source context
site.api.espn.com ↗sports.core.api.espn.com ↗sports.core.api.espn.com ↗sports.core.api.espn.com ↗sports.core.api.espn.com ↗sports.core.api.espn.com ↗sports.core.api.espn.com ↗site.api.espn.com ↗
These links provide event context. They do not verify every claim in a model report.
Recorded outcome: Jelena Ostapenko (LAT) bt (11) Diana Shnaider (RUS) 7-6 (8-6) 6-1
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