Estimated outcome probability. A likely winner can still be overpriced.
← Decision briefsTennis · Oct 10, 3:20 AM PDT YOUR RESEARCH TASK FORECASTLuciano Darderi RELIABILITY4/4 model reports MARKET VALUENot established
Stefanos Tsitsipas vs Luciano Darderi
58.3%Luciano Darderi
LOCKED Oct 10, 2:10 AM PDT4/4 independent models select Luciano Darderi; all four oriented probabilities average 58.25%.
Inspect forecast changes
A record of the change and whether it needs a follow-up.
- Compare the earlier and locked forecasts.
- Read the recorded reason and its limits.
- Decide whether the change needs further research.
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.
- Gemini: Darderi is ranked #21, while Tsitsipas is ranked #43.
- Claude: Darderi ranked 21 vs Tsitsipas 43; ranking points 2200 vs 1230
- Grok: Darderi current rank 21 vs Tsitsipas rank 43
- GPT: Luciano Darderi is ranked higher: No. 21 vs Stefanos Tsitsipas at No. 43.
Read all four model reports
Gemini · Luciano Darderi · 60.0%
Luciano Darderi holds a significant ranking advantage (21 vs 43) and nearly double the ranking points (2200 vs 1230) compared to Stefanos Tsitsipas. Both players have similar season win percentages (Darderi at 60.7% and Tsitsipas at 60.0%) and one title each, but Darderi's higher rank suggests better overall performance in recent tournaments. Surface form, injuries, head-to-head, travel, and market odds are unavailable.
google/gemini-3.1-pro-preview · Oct 10, 1:30 AM PDTClaude · Luciano Darderi · 58.0%
Only two usable signals are supplied: current ATP ranking and season singles win-loss. Darderi is ranked 21 (2200 points) versus Tsitsipas at 43 (1230 points), a meaningful but not large gap of roughly 22 places. Season records are nearly identical in win rate (Darderi 34-22, 60.7%; Tsitsipas 30-20, 60.0%), so the record provides no separation. Ranking momentum is mildly mixed (Darderi slipped 19 to 21; Tsitsipas improved 44 to 43). A ranking gap of this size typically translates to a modest edge, so I estimate Darderi near 58%. Surface-specific form (this is a hard-court Masters), injuries, head-to-head, travel/fatigue, and market odds are explicitly unavailable in the evidence package, which caps confidence and keeps the estimate close to the ranking-implied baseline.
anthropic/claude-opus-5 · Oct 10, 1:30 AM PDTGrok · Luciano Darderi · 57.0%
Darderi holds the superior current ranking (21 vs 43) and ranking points (2200 vs 1230) with a comparable season win-loss record (34-22 vs 30-20). These supplied ranking and record facts indicate Darderi as the stronger player on paper for this match. Surface form, injuries, head-to-head, travel, and market odds are unavailable per the evidence scope and are not used.
xai/grok-4.3 · Oct 10, 1:30 AM PDTGPT · Luciano Darderi · 58.0%
Using only the supplied evidence, Luciano Darderi has the stronger current profile: rank 21 versus Stefanos Tsitsipas at 43, plus a slightly better 2026 singles record at 34-22 versus 30-20. The ranking gap is the clearest signal in the package and points to Darderi as the more likely winner. Tsitsipas's record is still solid and not far behind on win rate, so this should not be priced as lopsided. Surface form, injuries, head-to-head, travel, and market odds are unavailable in the evidence package, which limits certainty and keeps the estimate relatively close to even rather than strongly favoring Darderi.
openai/gpt-5.4 · Oct 10, 1:30 AM PDTWhat remains uncertain
- Surface-specific form is not supplied.
- Head-to-head records are unavailable.
- Injury reports and travel fatigue are not provided.
- Market odds are absent.
- Surface-specific (hard-court) form not supplied despite the event being an outdoor hard-court Masters
- No injury, fitness, or withdrawal information
- No head-to-head record provided
- No travel, rest days, or prior-round scoreline data
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
- 2.0 percentage points lower for Luciano Darderi
The pre-event probability state was locked atomically and is immutable.
Record hash
ef246c9546ac73ac8a49374066774f0277b300403b3cb504ca427067ab44ac37 - First recorded forecast
First prospective probability state captured for this source and competition.
Record hash
931677c84a344228be7b1a50af1816120e680da5cc886071b7ff141159aacf92
Reasons are shown as they were recorded. The ledger does not establish that a specific fact caused a probability change.
The saved method comparison
This event has no eligible record in the new comparison cohort. Historical or late forecasts are not filled in after the event.
Inspect the methods and progress →Available 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: Stefanos Tsitsipas (GRE) bt (18) Luciano Darderi (ITA) 6-3 6-4
Finish your review
Record whether this brief helped, how long the review took, and your next action.
Return to your review →