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 25, 2:46 AM EST
Polymarket
This market refers to the tennis match between Sayaka Ishii and Rion Itaya in the W50 Nanao, Main Draw, originally scheduled for September 24, 2026 at 10:00PM ET. This market will resolve to 'Sayaka Ishii' if Sayaka Ishii advances against Rion Itaya. This market will resolve to 'Rion Itaya' if Rion Itaya advances against Sayaka Ishii. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 8, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
This market refers to the tennis match between Sayaka Ishii and Rion Itaya in the W50 Nanao, Main Draw, originally scheduled for September 24, 2026 at 10:00PM ET. This market will resolve to 'Sayaka Ishii' if Sayaka Ishii advances against Rion Itaya. This market will resolve to 'Rion Itaya' if Rion Itaya advances against Sayaka Ishii. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 8, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
Prediction market odds often reflect a different kind of wisdom than sportsbook odds. Sportsbooks typically set lines to balance action and incorporate a profit margin, while this market represents the aggregate predictions of informed traders. If a significant difference emerges between the implied probability on Polymarket and sportsbook odds, it could suggest that market participants have access to information or insights not yet fully priced into traditional betting lines. It’s important to consider that both represent probabilities, but are derived through different mechanisms.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the outcome. The price of a share directly corresponds to the implied 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 participate and express their views, the price fluctuates, providing a real-time assessment of expectations for the Sayaka Ishii vs Rion Itaya match. The market’s price reflects the collective intelligence of those actively trading it.
This market resolves around Oct 2, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official result of the Sayaka Ishii vs Rion Itaya match as determined by the governing body of W50 Nanao. Traders will be able to claim their winnings based on the final, verified result. The platform will then finalize payouts according to the share prices at the time of resolution.
Several signals could influence trading activity in this market. Any news regarding the condition of Sayaka Ishii or Rion Itaya, such as injuries or changes in training regimens, could significantly shift expectations. Updates on their recent performance in other matches, strategic adjustments, or even weather conditions on the day of the event could also impact the market. Increased media coverage or public discussion surrounding the match could also drive more volume and price movement on Polymarket.