KalshiCheck availabilityKYC required2% feeVerified resolution dataFairly calibratedCurrent implied probability
1+ Americans 79.2%Leader of 3 outcomesVig-adjusted: raw venue quotes summed above 100% and were normalized.
Market quality
52 / 100
Medium quality24h Volume
$307.6
Liquidity
$4.7K
Medium liquiditySpread
1.0 pt
Tight spreadMarket data
Updated 1 minute ago
Aug 20, 26, 7:37 PM UTCSep 21, 26, 2:00 PM UTC
Trends
Related Markets
Related questions for context, not a comparison of equivalent contracts.
US Open Men's Singles: Americans to Reach Final
KalshiUS Open Women's Singles: Americans to Reach Semifinals
KalshiUS Open 2026: To Reach Semifinals (Women's Singles)
PolymarketUS Open 2026: To Reach Semifinals (Men's Singles)
PolymarketUS Open Men's Singles Winner
KalshiUS Open Women's Singles Winner
GeminiRules
If the named outcome reach the Semifinals in the 2026 US Open Men's Singles, then the market resolves to Yes.
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Open markets
SportsPOLYMARKETUS Open ATP: Frances Tiafoe vs Alex Michelsen
- Michelsen Total Sets: O/U 3.5+34.5pt100%
- Michelsen Set 3 Winner+45.5pt100%
- Michelsen Total Sets: O/U 4.5+70.5pt100%
+25 more outcomes
- Total Vol
- $6.9M
- 24h Vol
- $6.9M
POLYMARKETUEFA Champions League: 2027 Champion
- Barcelona17.9%
- Arsenal15.1%
- Bayern Munich13.2%
+33 more outcomes
- Total Vol
- $28.5M
KALSHIHouston vs Philadelphia
- Houston+48.0pt91.1%
- Philadelphia-48.0pt8.9%
- Total Vol
- $2.8M
- 24h Vol
- $2.7M
KALSHIUS Open Men's Singles Winner
- Carlos Alcaraz+1.0pt58%
- Alexander Zverev+4.0pt26%
- Ben Shelton+2.0pt9%
+45 more outcomes
- Total Vol
- $28.6M
KALSHIBrace vs Sorribes Tormo
- Cadence Brace52%
- Sara Sorribes Tormo48%
- Total Vol
- $2.2M
- 24h Vol
- $2M
KALSHIShelton vs Alcaraz
- Carlos Alcaraz-1.0pt77.2%
- Ben Shelton+1.0pt22.8%
- Total Vol
- $2.1M
- 24h Vol
- $1.9M
Frequently asked questions
- What are the current odds for US Open Men's Singles: Americans to Reach Semifinals?
- Kalshi prices 1+ Americans at 79% as of September 9, 2026.
- When does US Open Men's Singles: Americans to Reach Semifinals resolve?
- US Open Men's Singles: Americans to Reach Semifinals is scheduled to resolve on September 21, 2026.
- How is US Open Men's Singles: Americans to Reach Semifinals settled?
- Kalshi settles this market as follows: If the named outcome reach the Semifinals in the 2026 US Open Men's Singles, then the market resolves to Yes.