TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 17, 12:08 AM EST
Polymarket
This market tracks whether Kayla Day will advance against Liudmila Samsonova in their scheduled tennis match at the Guadalajara Open Akron. Currently, Polymarket gives a 100.0% probability to the outcome of “Guadalajara Open Akron: Completed Match: Kayla Day vs Liudmila Samsonova”. The resolution source for this market is the official WTA Tennis scores website at https://www.wtatennis.com/scores. Keep an eye on the originally scheduled match time of September 16, 2026 at 12:00PM ET, as that is when the initial signal for resolution will be observed.
This market refers to the tennis match between Kayla Day and Liudmila Samsonova in the Guadalajara Open Akron, originally scheduled for September 16, 2026 at 12:00PM ET. This market will resolve to 'Kayla Day' if Kayla Day advances against Liudmila Samsonova. This market will resolve to 'Liudmila Samsonova' if Liudmila Samsonova advances against Kayla Day. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 30, 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 WTA Tour. A consensus of credible reporting may also be used.
Typically, prediction market odds reflect a different kind of wisdom than those found at sportsbooks. Sportsbooks set lines to balance action and incorporate a profit margin, while this market aggregates the beliefs of a diverse group of traders. Often, prediction markets are more accurate than traditional forecasts, especially when considering events with uncertain outcomes. However, discrepancies can occur due to differing information or biases. It’s common to see prediction market probabilities diverge from sportsbook implied probabilities, especially as new information emerges leading up to the match.
On Polymarket, this market is priced through a continuous auction mechanism, where traders buy and sell shares representing their belief in the outcome of the Day vs Samsonova match. The price of a share directly reflects the implied probability of that outcome being correct. As more traders participate, the price adjusts to reflect the collective wisdom of the crowd. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. This means the price can fluctuate significantly based on news, analysis, or even shifts in overall market sentiment. The market’s efficiency depends on the number of active traders and the information they incorporate.
This market resolves around Sep 23, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the Guadalajara Open Akron match between Kayla Day and Liudmila Samsonova, as reported by a recognized tennis authority. The platform will verify the result against publicly available data to determine which outcome corresponds to the actual winner of the match. Traders will then be paid out based on the final outcome and their holdings in the market.
Several signals could significantly move this market before resolution. Any news regarding player injuries, changes in playing conditions, or updated match analysis from tennis experts could influence trader behavior. Unexpected results in earlier rounds of the tournament, or even broader shifts in player form, might also lead to price adjustments. Furthermore, large trades by influential market participants could create short-term volatility. Monitoring tennis news sources and tracking changes in player rankings will be key to understanding potential catalysts for movement in this market.