Estimated outcome probability. A likely winner can still be overpriced.
← Decision briefsTennis · Sep 13, 11:15 AM PDT YOUR RESEARCH TASK FORECASTAlexander Zverev RELIABILITY4/4 model reports MARKET VALUENot established
Ben Shelton vs Alexander Zverev
63.6%Alexander Zverev
LOCKED Sep 13, 10:30 AM PDT4/4 independent models select Alexander Zverev; all four oriented probabilities average 63.63%.
Check the evidence
The most important gap and your next source check.
- Read the model reasons and reported limits.
- Inspect available source context; record missing sources.
- Identify what remains unverified and your next action.
19 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.
- Claude: Zverev ranked No. 1 vs Shelton No. 8 (ESPN current rank)
- Grok: Zverev ATP rank 1 vs Shelton rank 8
- Gemini: Alexander Zverev's #1 ranking vs Ben Shelton's #8 ranking
- GPT: Alexander Zverev is ranked No. 1; Ben Shelton is ranked No. 8.
Read all four model reports
Claude · Alexander Zverev · 62.0%
Only two usable signals are supplied: current rank and season singles record. Zverev is ranked No. 1 versus Shelton at No. 8, and has a better win rate (46-13, .780) than Shelton (33-13, .717). A seven-place ranking gap at the top of the tour plus a modest win-rate edge typically maps to roughly a 60-65% favorite in a best-of-five hard-court final, with some compression because both are elite and finals between top-10 players tend toward parity. Shelton's higher title count (4 vs 1) is a mild counterweight suggesting he converts deep runs, so I do not push the favorite beyond the low 60s. No surface-specific form, injury status, head-to-head, travel/rest, or market odds are available, so this estimate is deliberately conservative and near the base rate for a higher-ranked favorite.
anthropic/claude-opus-5 · Sep 12, 5:05 PM PDTGrok · Alexander Zverev · 62.0%
Alexander Zverev is ranked 1 with 46 singles wins and 13 losses versus Ben Shelton at rank 8 with 33 wins and 13 losses. Zverev therefore receives the edge on supplied ranking and season record. Surface form, injuries, head-to-head, travel, and market odds are unavailable as explicitly stated in evidence scope.
xai/grok-4.3 · Sep 12, 5:00 PM PDTGemini · Alexander Zverev · 62.5%
Alexander Zverev is ranked #1 with a superior season win rate of 78.0% (46-13) compared to Ben Shelton's #8 rank and 71.7% win rate (33-13). Although Shelton has more titles this season (4 to 1), Zverev's overall consistency and top ranking make him the statistical favorite. Confidence is low due to the absence of surface-specific form, head-to-head records, and market odds.
google/gemini-3.1-pro-preview · Sep 12, 5:00 PM PDTGPT · Alexander Zverev · 68.0%
Using only the supplied evidence, Alexander Zverev has the stronger pre-match profile. He is ranked No. 1 versus Ben Shelton at No. 8, and his season record is 46-13 compared with Shelton's 33-13. That gives Zverev both the higher ranking and the larger body of season wins at a similarly low loss count, which supports making him the favorite. Because the evidence package explicitly limits us to current ranking and overall season singles record only, this estimate cannot account for surface form, injuries, head-to-head, travel, or market odds; those are unavailable here. With those important factors absent, the forecast should be kept moderate rather than extreme.
openai/gpt-5.4 · Sep 12, 5:00 PM PDTWhat remains uncertain
- Surface-specific (hard-court) form not supplied
- Injury and fitness status not supplied
- Head-to-head record not supplied
- Travel, rest days, and prior-round match load not supplied
- Market odds not supplied
- Feed labels the event as 'wta' tour, an apparent tagging inconsistency; ranking points and previous rank are null
- Surface-specific form unavailable
- Injuries unavailable
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
- 0.6 percentage points higher for Alexander Zverev
The pre-event probability state was locked atomically and is immutable.
Record hash
b8fd1646463dbaefc8489e570fb47106211984f5a74f71ef581e2187cabac79d - First recorded forecast
First prospective probability state captured for this source and competition.
Record hash
9bac32c25421152b319bc6580d5fab87f7b0c09ae04c536574800ffe293dde19
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 ↗site.api.espn.com ↗
These links provide event context. They do not verify every claim in a model report.
Recorded outcome: (1) Alexander Zverev (GER) bt (8) Ben Shelton (USA) 6-3 7-6 (7-2) 5-7 6-2
Finish your review
Record whether this brief helped, how long the review took, and your next action.
Return to your review →