Jannik Sinner to win every major tennis event by 2028
KalshiCheck availabilityKYC requiredVerified resolution dataWell calibratedData quality warningStale data
Data as of Oct 30, 2026, 3:48 PM UTC · policy pm-quality-4
Selected book midpoint
No · —
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Stored price
No 77.5%
No 77.5%Market quality
26 / 100
Low quality24h Volume
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Open interest
$211.7
Low open interestBid / Ask
— / —
NoSpread
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Market data
Updated 1 hour ago
LaggingMay 16, 26, 2:30 AM UTCJan 1, 29, 3:00 PM UTC
Chart and changes show stored historical probabilities, not the selected live book.
Trends
Selected row: book midpoint. Other rows: stored references, possibly normalized; 24h changes use stored history.
Venue terms
Source: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Early close:
- Yes
- Settlement timer:
- 5m (informational)
Market depth · No
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Related Markets
Related questions for context, not a comparison of equivalent contracts.
Jannik Sinner: Grand Slam wins in 2027
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KalshiGuangzhou Open: Lilli Tagger vs Han Shi
PolymarketRules
This outcome's exact rule is not available.
- If Jannik Sinner does not win ATP Rome, the French Open, and the 2028 Summer Olympics tennis tournament before Jan 1, 2029, then the market resolves to No. Kalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.
Rules for each outcome
- No
- This outcome's exact rule is not available.
- Yes
- This outcome's exact rule is not available.