TOTAL VOLUME:
$154.7b
24H VOL:
$279,496,801
24H TRANSACTIONS:
2,984,640,614
OPEN INTEREST:
$1,923,931,766
416,910
Markets across
40,107
events
MATCHED EVENTS:
4,571
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 18, 1:32 PM EST
Polymarket
This market refers to the tennis match between Isadora Sigrist and Guisella Insfran in the W15 Campina Grande, Qualifying, originally scheduled for October 18, 2026 at 10:00AM ET. This market will resolve to 'Isadora Sigrist' if Isadora Sigrist advances against Guisella Insfran. This market will resolve to 'Guisella Insfran' if Guisella Insfran advances against Isadora Sigrist. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 1, 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 Isadora Sigrist and Guisella Insfran in the W15 Campina Grande, Qualifying, originally scheduled for October 18, 2026 at 10:00AM ET. This market will resolve to 'Isadora Sigrist' if Isadora Sigrist advances against Guisella Insfran. This market will resolve to 'Guisella Insfran' if Guisella Insfran advances against Isadora Sigrist. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 1, 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 the collective wisdom of a diverse group of traders, potentially offering a different perspective than traditional sportsbooks. Sportsbooks set their odds based on models and expert analysis, while this market relies on the incentives of individuals betting with their own capital. Consequently, you may observe discrepancies between the implied probabilities on Polymarket and those offered by sportsbooks. These differences can arise from varying information access, biases, or simply differing interpretations of the same data regarding the Sigrist vs Insfran match.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the likelihood of a particular outcome. The price of these shares fluctuates based on supply and demand, effectively creating a real-time probability assessment of the Sigrist vs Insfran match. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate, the price converges towards what the market collectively believes is the fair probability. This dynamic pricing ensures that the market reflects the most up-to-date information and sentiment.
This market resolves around Oct 25, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the W15 Campina Grande match between Isadora Sigrist and Guisella Insfran. The platform will rely on publicly available and authoritative sources to determine the winner of the match, ensuring a transparent and verifiable resolution process. Traders should monitor official sources for the final result to understand how this market will settle.
Several factors could influence the price of this market before resolution. Any news regarding player form, injuries to either Isadora Sigrist or Guisella Insfran, or changes in playing conditions could all shift trader sentiment. Unexpected results in other matches involving these players, or even broader trends in women's tennis, might also impact the market. Furthermore, significant trading volume from informed participants could signal new information or a change in expectations, potentially leading to price movements in this market.