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 22, 5:26 AM EST
Polymarket
This market refers to the tennis match between Ikumi Yamazaki and Rinko Matsuda in the W50 Nanao, Main Draw, originally scheduled for September 22, 2026 at 12:00AM ET. This market will resolve to 'Ikumi Yamazaki' if Ikumi Yamazaki advances against Rinko Matsuda. This market will resolve to 'Rinko Matsuda' if Rinko Matsuda advances against Ikumi Yamazaki. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 6, 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 Ikumi Yamazaki and Rinko Matsuda in the W50 Nanao, Main Draw, originally scheduled for September 22, 2026 at 12:00AM ET. This market will resolve to 'Ikumi Yamazaki' if Ikumi Yamazaki advances against Rinko Matsuda. This market will resolve to 'Rinko Matsuda' if Rinko Matsuda advances against Ikumi Yamazaki. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 6, 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.
Comparing prediction market odds to sportsbook odds reveals how the wisdom of the crowd differs from professional oddsmakers. Often, prediction markets can incorporate information faster than sportsbooks, especially regarding factors not easily quantifiable. However, sportsbooks have sophisticated models and risk management strategies. Discrepancies between the two can present opportunities for arbitrage, though transaction costs and market friction often limit these. It’s common to see initial differences that narrow as the event approaches, as both types of markets react to new information.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in each outcome. The price of a share directly reflects the implied probability of that outcome occurring. As more traders buy shares in a particular player, the price increases, and the implied probability rises. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price is determined solely by supply and demand; there are no external factors influencing the valuation. This dynamic pricing allows for a constantly updated assessment of the likely winner.
This market resolves around Sep 29, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will depend on the official result of the W50 Nanao: Ikumi Yamazaki vs Rinko Matsuda match. The platform will rely on established sources to determine the winner, ensuring a transparent and accurate outcome. Traders should monitor official announcements to understand the final result and how it impacts the market’s settlement.
Several signals could significantly move this market before resolution. Any news regarding the players' physical condition, training progress, or strategic changes could impact trader sentiment. Unexpected announcements about the match schedule or venue could also cause shifts in the odds. Public opinion, as reflected in polls or expert analyses, might also influence trading activity. Ultimately, any information that alters perceptions of each player's chances of winning has the potential to move this market.