TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 7, 4:09 PM EST
Polymarket
This market refers to the tennis match between Michael Antonius and Simone Massellani in the US Open Juniors, Boys, originally scheduled for September 7, 2026 at 11:00AM ET. This market will resolve to 'Michael Antonius' if Michael Antonius advances against Simone Massellani. This market will resolve to 'Simone Massellani' if Simone Massellani advances against Michael Antonius. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 21, 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. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.
This market refers to the tennis match between Michael Antonius and Simone Massellani in the US Open Juniors, Boys, originally scheduled for September 7, 2026 at 11:00AM ET. This market will resolve to 'Michael Antonius' if Michael Antonius advances against Simone Massellani. This market will resolve to 'Simone Massellani' if Simone Massellani advances against Michael Antonius. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 21, 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. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the likelihood of each outcome. The price of a share directly reflects the implied probability of that outcome occurring. As more traders participate, the market price adjusts to reflect the collective intelligence of the crowd. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The current price indicates what traders are willing to pay for a share representing the outcome of the US Open Juniors Boys match, effectively forecasting the likely winner.
This market resolves around Sep 14, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the US Open Juniors Boys match between Michael Antonius and Simone Massellani as reported by the tournament organizers. The platform will verify the result against publicly available sources to determine the winning outcome and settle the market accordingly. Traders should monitor official sources for the final result to understand when the market will be finalized.
Several factors could influence the trading activity and shift the odds in this market. Any news regarding player injuries, changes in playing conditions, or updated rankings could significantly impact trader sentiment. Unexpected upsets in earlier rounds of the tournament, or strong performances by either Michael Antonius or Simone Massellani in other matches, could also lead to price movements. Furthermore, significant betting activity or large trades on Polymarket itself can create momentum and influence the market’s direction before the match takes place.