KalshiCheck availabilityKYC required2% feeVerified resolution dataFairly calibratedCurrent implied probability
Jannik Sinner 79.8%Leader of 13 outcomesVig-adjusted: raw venue quotes summed above 100% and were normalized.
Market quality
68 / 100
Medium quality24h Volume
$9.1K
Liquidity
$145.5K
High liquiditySpread
1.0 pt
Tight spreadMarket data
Updated 2 minutes ago
Dec 20, 25, 3:00 PM UTCDec 31, 26, 4:59 AM UTC
Trends
Related Markets
Related questions for context, not a comparison of equivalent contracts.
Who will win a WTA Grand Slam in 2026?
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KalshiWho will be the next first-time men's singles Grand Slam winner in tennis?
Manifold MarketsRules
If the named outcome wins a tennis major (the Australian Open, the U.S. Open, the French Open, or Wimbledon) before Dec 31, 2026, then the market resolves to Yes.
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Open markets
SportsKALSHISabalenka vs Noskova
- Aryna Sabalenka+6.0pt74.5%
- Linda Noskova-5.0pt25.5%
- Total Vol
- $14.2M
- 24h Vol
- $13.1M
POLYMARKETCounter-Strike: G2 vs Astralis (BO3) - FISSURE PLAYGROUND Group A
- 2 Winner+33.0pt100%
- O/U 2.5 Games+57.0pt100%
- 1 Rounds Handicap: Astralis (-3.5) vs G2 (+3.5)100%
+29 more outcomes
POLYMARKETUEFA Champions League: 2027 Champion
- Barcelona18.1%
- Arsenal15.2%
- Paris Saint-Germain13.3%
+33 more outcomes
- Total Vol
- $27.9M
ROBINHOOD (ROTHERA)Aryna Sabalenka vs Linda Noskova Quarter Finals match
- Aryna Sabalenka72.6%
- Linda Noskova27.4%
- Total Vol
- $18.1K
- 24h Vol
- $2.2M
KALSHIUS Open Men's Singles Winner
- Carlos Alcaraz57%
- Alexander Zverev+5.0pt26%
- Ben Shelton9%
+45 more outcomes
- Total Vol
- $28M
- 24h Vol
- $2.2M
KALSHIClub Brugge vs Aston Villa
- Aston Villa+49.0pt87.1%
- Tie-17.0pt9.9%
- Club Brugge-31.0pt3%
- Total Vol
- $2.5M
- BV Borussia 09 Dortmund vs. Villarreal CF
- US Open WTA: Aryna Sabalenka vs Linda Noskova
- Tiafoe vs Michelsen
- Genoa: Thiago Seyboth Wild vs Francesco Ferrari
- United Arab Emirates vs Bangladesh
- 2027 Pro Football Champion
- MLB: Chicago Cubs vs Milwaukee Brewers (Sep 7, 2026)
- MLB: New York Mets vs Miami Marlins (Sep 7, 2026)
- Amgen Irish Open Winner
- MLB: Arizona Diamondbacks vs Kansas City Royals (Sep 7, 2026)
- Real Madrid vs Inter
- US Open ATP: Frances Tiafoe vs Alex Michelsen
Frequently asked questions
- What are the current odds for Who will win a ATP Grand Slam in 2026??
- Kalshi prices Jannik Sinner at 80% as of September 8, 2026.
- When does Who will win a ATP Grand Slam in 2026? resolve?
- Who will win a ATP Grand Slam in 2026? is scheduled to resolve on December 31, 2026.
- How is Who will win a ATP Grand Slam in 2026? settled?
- Kalshi settles this market as follows: If the named outcome wins a tennis major (the Australian Open, the U.S. Open, the French Open, or Wimbledon) before Dec 31, 2026, then the market resolves to Yes.