Will Alcaraz or Sinner win more Grand Slams in 2026?
Probability
40¢
1h
+0.0pp
24h
+0.0pp
24h Vol
$3.53
Liquidity
$1.6K
Canonical status
confidence: highSource status (Polymarket)
Derived status (Orrery)
Reason
Active market, expiry beyond the near-expiry window.
Resolution & Risk
LOW risk- End date
- Sep 13, 2026
- UMA status
- n/a
- Resolution source
- Primaryconsensus of credible reportingTypeNews consensusConfidenceextracted · medium
- Market type
- Binary
- Wide spread (8.0¢) — liquidity risk on entry/exit.
Probability (last 7 days)
+0.5pp 7dWhy did it move?
Structured · 2 factors- 01Active signal
Resolution-risk observation firing
Spread is wide enough that intraday moves overstate any tradeable edge.
- 02Spread cost
Wide spread — 8.0¢
Bid-ask spread is wide enough that intraday moves overstate any tradeable advantage. Most of the headline pp move would be eaten by spread on a market order.
What to track next
- Verify the resolution source on this page — exchange feed, official release, news consensus — before treating any move as new information.
Verification actions only — never trade recommendations.
Each factor is grounded in a single named metric you can verify on this page — probability, volume, liquidity, signal, resolution state. No predictions, no prose hallucinations.
Resolution & Risk
LOW risk- End date
- Sep 13, 2026
- UMA status
- n/a
- Resolution source
- Primaryconsensus of credible reportingTypeNews consensusConfidenceextracted · medium
- Market type
- Binary
- Wide spread (8.0¢) — liquidity risk on entry/exit.
Timeline
critical · price · trade flowCritical
- Sep 13, 00:00 UTCScheduled resolutionLOW
Market resolves in 2818.8h
- 13:09SignalLOW
Resolution risk
Spread is wide enough that intraday moves overstate any tradeable edge.
Price movement
+0.0pp over the last 24h, now 40¢.
Active signals
Recent Trades
No recent trades visible from the Data API for this market. That usually means liquidity is thin or this market is between event windows.
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Market Description
This is a market to predict whether Carlos Alcaraz or Jannik Sinner wins more Grand Slam championships in 2026. If Carlos Alcaraz wins more Grand Slams in 2026 than Jannik Sinner, this market will resolve to “Alcaraz”. If Jannik Sinner wins more Grand Slams in 2026 than Carlos Alcaraz, this market will resolve to “Sinner”. If Alcaraz and Sinner win the same amount of Grand Slams in 2026, this market will resolve 50-50. Only victories in Men’s Singles Grand Slam tournaments will be considered for this market’s resolution. The relevant 2026 Grand Slams are the Men’s Singles tournaments in the 2026 Australian Open, French Open, U.S. Open, and Wimbledon. If it becomes impossible for either Alcaraz or Sinner to win as many Grand Slams in 2026 as the other (e.g. Alcaraz wins the first three grand slams), this market will resolve immediately. Otherwise, this market will resolve when the results of the final 2026 Grand Slam are official. The primary resolution source for this market will be information from the organizers of the Grand Slam tournaments; however, a consensus of credible reporting may also be used.
Why this category?
confidence: highCategory
Source
Matched term
wimbledonReason
Wimbledon — Sports.
Categories come from a deterministic engine: manual overrides (highest priority) → sports hard markers → event-tag rules → keyword rules → Gamma category hint → default. The engine is versioned in category-overrides.ts; methodology lives at /methodology.
FAQ — questions readers actually ask
What is the current Polymarket probability for "Will Alcaraz or Sinner win more Grand Slams in 2026?"?
As of Mon, 18 May 2026 13:09:10 GMT, YES is priced at 40% implied probability on Polymarket. The price changed +0.0pp in the last 24 hours, +0.0pp in the last hour, and +0.5pp in the last 7 days.
When does this market resolve?
This market resolves by Sep 13, 2026 (2026-09-13T00:00:00.000Z). Resolution is determined from the market description on Polymarket.
What source determines the outcome?
Resolution is sourced from the market description on Polymarket. Polymarket's UMA optimistic oracle is the final settlement layer; if the published source is ambiguous, UMA tokenholders adjudicate. Source-extraction confidence is shown in the Resolution & Risk block above.
How much is being traded on this market?
$3.53 of trading volume in the last 24 hours. Lifetime volume on Polymarket: $4.7K. Open liquidity in the YES/NO orderbooks: $1.6K. Spread between best bid and best ask: 8.0¢.
Is this a trade recommendation?
No. Orrery describes — never predicts. Every signal on this market carries explicit Evidence, Backtest, and Action tiers. The Action is always one of: Watch only, Inspect timeline, Create alert, Verify source, or Ignore — never Buy or Sell. The probability above is the market's collective implied probability, not a forecast Orrery is publishing.
How fresh is this data and where does it come from?
This page revalidates from the public Polymarket APIs every 30 seconds. Probability and 24h-change come from Gamma; the chart series comes from the CLOB orderbook history; trade and holder data come from the Data API. The fetched-at timestamp on each block tells you exactly how old the underlying upstream pull was.
Alerts
In-app banners fire as soon as a rule is satisfied. Email digests are wired to a server-side cron and continue while your tabs are closed. Telegram and Discord are planned — every existing rule will keep working as channels light up.