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Home/Macro / Fed/Will Jannik Sinner win the 2026 Men's US Open?
PolymarketMacro / FedUpdated 6m ago

Will Jannik Sinner win the 2026 Men's US Open?

Market probability
30.5%
−1.5 percentage points
over 24 hours32.0% → 30.5%
24 days until the scheduled event
Deadline: September 12, 2026 at 8:00 PM ET
Resolution follows the outcome of the scheduled event.

Confirmed repricing; the market is settling at the new level.

The pricing is supported by healthy trading volume and market depth, a tight spread.

How credible was the move?

Three separate questions — a move can be genuine while the latest price is still settling. Methodology →

Move validity

Is the move backed by real trading and depth?

Strong

The pricing is supported by healthy trading volume and market depth, a tight spread.

Consensus stability

Has the market settled at the new probability?

Forming

Movement has slowed (1.5 points over six hours) but the market has not fully settled.

Contract clarity

Will the rules resolve without ambiguity?

High

The resolution rules are relatively specific, with a named source and a defined deadline.

Recent trade activity$2.6K traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

What this market actually measures

The 2026 U.S. Open tennis tournament is scheduled for August 23 - September 13, 2026.

This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.

View full official resolution rules

The 2026 U.S. Open tennis tournament is scheduled for August 23 - September 13, 2026. This market will resolve to the player that wins the 2026 U.S. Open Men’s Singles Tournament. If at any point it becomes impossible for a listed player to win the 2026 U.S. Open Men’s Singles Tournament per the rules of the tournament, the corresponding market will resolve to “No”. If the 2026 U.S. Open Men’s Singles Tournament is cancelled, postponed after October 31, 2026, or there is otherwise no winner declared within that timeframe, this market will resolve to “Other”. The primary resolution source will be official information from the U.S. Open (https://www.usopen.org/index.html); however, a consensus of credible reporting may also be used.

What could move this market next?

  • The scheduled event takes placeSeptember 12, 2026 at 8:00 PM ET

    The contract resolves on the event's outcome.

Derived from the contract's own mechanics as of Aug 19, 2:37 AM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: high · expected error ±13 pts.

Trading normallyLegacy movement classifier: meaningful

What's happening

low classifier confidence
Trading normally

Liquid, two-sided, and calm. The current price reads as settled consensus — the latest print is a reasonable summary of what the market believes.

Market data

24h volume

$55K

Change (pts)1H-1.06H-1.524H-1.57D-1.5
Score breakdown — Movement, Liquidity & Trust

ProbCast Trust Score

63/ 100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

ProbCast measures how reliable this market probability appears — not what to trade.

Movement50

Magnitude of recent probability change

Liquidity80

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ProbCast — Odds Reliability

Know whether prediction-market odds can be trusted. ProbCast analyzes liquidity, market activity, spreads, and price movement to help distinguish meaningful repricing from thin-market noise.

Questions? Chat with us on Telegram
TodayTop MoversEventsAll MarketsWhat ChangedVenue DivergencePolymarket vs KalshiMethodologyCoverageMeta's ArenaWatchlistTerms of UsePrivacyCrypto
  • Liquid, two-sided, and calm — price behaving as settled consensus

Read the latest price with caution; conditions make it an unreliable summary right now.

More details — reliability score, dynamics, durability
Reliability score
32Low
Where the price path tends to go next355 observed
  • Stable consensus93%
  • Choppy / mean-reverting5%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityHigh· half-life ~8h
PredictabilityStable

Secondary read: leaning toward Trending.

A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

Liquidity

$113.6K

Total volume

$313.4K

Category
Macro / Fed
Venue
Polymarket
Open interest
—
Spread
1.0 pts
Best bid
30.0%
Best ask
31.0%
7-day range
30.5% – 32.0%
Resolves
Sep 12, 2026

Depth of the order book and volume

Trust breakdown

63/100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

  • Liquidity anchor+56
  • Price steadiness+15
  • Limited history-8
Trust score63 / 100
How these scores work →
View on Polymarket

ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. ProbCast is not a betting platform, exchange, or broker and does not provide buy or sell recommendations. Intended for users 18+; availability of prediction-market activity varies by jurisdiction. Venue data is aggregated from third parties and may be delayed or inaccurate. See our Terms of Use.

Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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