TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 9, 7:16 PM EST
Polymarket
This market tracks whether there will be over or under 8.5 games played in the third set of the Karen Khachanov versus Alexander Blockx match at the US Open ATP tournament. Currently, Polymarket gives a 100.0% probability to “Khachanov vs. Blockx: Set 3 Games O/U 8.5”. The resolution source for this market is the official ATP Tour website at https://www.atptour.com/en/scores/current. Keep an eye on the originally scheduled match time of September 9, 2026 at 11:30AM ET, as the start of the match will be a key signal for determining whether a third set will be played at all.
This market refers to the tennis match between Karen Khachanov and Alexander Blockx in the US Open ATP, originally scheduled for September 9, 2026 at 11:30AM ET. This market will resolve to 'Karen Khachanov' if Karen Khachanov advances against Alexander Blockx. This market will resolve to 'Alexander Blockx' if Alexander Blockx advances against Karen Khachanov. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 23, 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 markets like Polymarket can offer a different perspective than traditional sportsbooks. Sportsbooks set odds based on their own models and incorporate a profit margin, while this market reflects the collective wisdom of traders. If a significant number of traders believe a sportsbook is undervaluing a particular outcome, the odds on Polymarket may move in the opposite direction. It’s common to see discrepancies, especially when public opinion diverges from expert analysis, offering potential value for informed traders.
On Polymarket, this market is priced through a continuous exchange where traders buy and sell shares representing their belief in the outcome. The price of these shares directly reflects the probability of that outcome occurring. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders buy shares in a particular outcome, the price increases, and the implied probability rises. Conversely, selling pressure lowers the price and reduces the probability. This dynamic pricing mechanism ensures that the market odds are constantly updated based on the latest information and collective sentiment.
This market resolves around Sep 16, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the Khachanov vs. Blockx match as declared by the official tournament organizers. The platform will verify the result against these sources to determine which outcome – Khachanov winning or Blockx winning – is the correct one, and shares will be settled accordingly. Traders should monitor official sources for the final result.
Several factors could influence this market before the match concludes. Any news regarding player injuries, changes in playing conditions (like weather if it's an outdoor court), or even significant shifts in public perception could cause the odds to move. Strong performances by either player in other recent matches, or even pre-match interviews revealing strategic insights, could also impact trading activity. Unexpected upsets in other matches within the tournament could also indirectly affect confidence in either player, leading to shifts in volume and price.