Current implied probability
Michelsen Set 1 O/U 8.5 81%+2.5ptLeader of 28 outcomes
Market quality
≤74 / 100
Medium quality24h Volume
$119K
Liquidity
$1.3M
High liquiditySpread
1.0 pt
Tight spreadComments
0
Market data
Updated 3 minutes ago
Sep 6, 26, 11:05 PM UTCSep 15, 26, 3:30 PM UTC
Trends
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PolymarketRules
This market refers to the tennis match between Frances Tiafoe and Alex Michelsen in the US Open ATP, originally scheduled for September 8, 2026 at 11:30AM ET.
- This market will resolve to 'Frances Tiafoe' if Frances Tiafoe advances against Alex Michelsen.
- This market will resolve to 'Alex Michelsen' if Alex Michelsen advances against Frances Tiafoe.
- If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 22, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50.
- If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
- If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
Prediction Source Comparison
Open markets
Sports
KALSHIUS Open Men's Singles Winner
- Carlos Alcaraz-2.0pt56%
- Alexander Zverev+6.0pt28%
- Ben Shelton-1.0pt8%
+45 more outcomes
- Total Vol
- $27.8M
- 24h Vol
- $2.6M
POLYMARKETBarranquilla: Julieta Pareja vs Lucrezia Stefanini
- Stefanini50%
- Stefanini Set 1 Winner50%
- Stefanini Set 2 Winner50%
+13 more outcomes
- Total Vol
- $2M
ROBINHOOD (ROTHERA)MLB: Chicago Cubs vs Milwaukee Brewers (Sep 7, 2026)
- MIL+44.0pt99%
- CHC-46.0pt1%
- Total Vol
- $1.5M
- 24h Vol
- $1.5M
ROBINHOOD (ROTHERA)MLB: New York Mets vs Miami Marlins (Sep 7, 2026)
- NYM+51.0pt99%
- MIA-53.0pt1%
- Total Vol
- $1.3M
- 24h Vol
- $1.3M
ROBINHOOD (ROTHERA)MLB: Arizona Diamondbacks vs Kansas City Royals (Sep 7, 2026)
- ARI+28.0pt79.8%
- KC-31.0pt20.2%
- Total Vol
- $1.2M
- 24h Vol
- $1.2M
KALSHI2027 Pro Football Champion
- Los Angeles R13.8%
- Buffalo6.5%
- Seattle6.5%
+29 more outcomes
- Total Vol
- $83.8M
- 24h Vol
- $1.2M
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Frequently asked questions
- What are the current odds for US Open ATP: Frances Tiafoe vs Alex Michelsen?
- Polymarket prices Michelsen Set 1 O/U 8.5 at 81% as of September 8, 2026.
- When does US Open ATP: Frances Tiafoe vs Alex Michelsen resolve?
- US Open ATP: Frances Tiafoe vs Alex Michelsen is scheduled to resolve on September 15, 2026.
- How is US Open ATP: Frances Tiafoe vs Alex Michelsen settled?
- Polymarket settles this market as follows: This market refers to the tennis match between Frances Tiafoe and Alex Michelsen in the US Open ATP, originally scheduled for September 8, 2026 at 11:30AM ET.
- Where else is US Open ATP: Frances Tiafoe vs Alex Michelsen listed?
- The same question is also listed on Futuur, Limitless, Gemini.