TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 5, 4:25 PM EST
Polymarket
This market tracks whether Alexander Blockx will advance against Flavio Cobolli in their US Open ATP match, originally scheduled for September 4, 2026 at 11:00AM ET. Currently, Polymarket gives a 100.0% probability to the outcome of “US Open ATP: Completed Match: Alexander Blockx vs Flavio Cobolli”. Resolution will be based on the official scores reported at https://www.atptour.com/en/scores/current. Keep an eye on the match itself, as the outcome will be determined by the completion of the match on or before the resolution date of September 11, 2026.
This market refers to the tennis match between Alexander Blockx and Flavio Cobolli in the US Open ATP, originally scheduled for September 4, 2026 at 11:00AM ET. This market will resolve to 'Alexander Blockx' if Alexander Blockx advances against Flavio Cobolli. This market will resolve to 'Flavio Cobolli' if Flavio Cobolli advances against Alexander Blockx. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 18, 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.
Typically, prediction market odds reflect a wisdom-of-the-crowd perspective, often differing from traditional sportsbook odds. Sportsbooks set lines based on their own models and to balance action, while this market is driven purely by traders’ willingness to buy or sell. If a significant number of informed bettors believe a sportsbook is mispricing a player's chances, the prediction market may show a different probability. It's common to see discrepancies, especially early in the betting cycle, as the market incorporates new information and diverse opinions about the Blockx vs Cobolli match.
On Polymarket, this market is priced through a continuous double auction. Traders can buy 'yes' shares if they believe Alexander Blockx will win, or 'no' shares if they believe Flavio Cobolli will win. The price of these shares fluctuates based on supply and demand, reflecting the collective prediction of the market participants. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The closer the match gets, the more volatile the price is likely to become as new information emerges and traders adjust their positions. The current price represents the market's assessment of each player’s probability of victory.
This market resolves around Sep 11, 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 ATP match between Alexander Blockx and Flavio Cobolli, as declared by the tournament organizers. The winner of the match will determine the outcome of this market, with 'yes' shares paying out if Blockx wins and 'no' shares paying out if Cobolli wins. The resolution process ensures a transparent and verifiable result for all traders.
Several factors could influence the price of this market before the match concludes. Any news regarding player injuries, changes in playing conditions, or even updated rankings could significantly shift trader sentiment. Unexpected announcements about coaching changes or a player's physical condition would also be catalysts. Furthermore, early performance in the US Open tournament for either Blockx or Cobolli, or their head-to-head record, could impact the market. As the match draws closer, any pre-match analysis from tennis experts could also move the market.