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: Jul 24, 3:00 AM EST
Polymarket
This market refers to the tennis match between Tamara Zidansek and Petra Marcinko in the Iasi Open, originally scheduled for July 17, 2026 at 3:00AM ET. This market will resolve to 'Tamara Zidansek' if Tamara Zidansek advances against Petra Marcinko. This market will resolve to 'Petra Marcinko' if Petra Marcinko advances against Tamara Zidansek. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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.
This market refers to the tennis match between Tamara Zidansek and Petra Marcinko in the Iasi Open, originally scheduled for July 17, 2026 at 3:00AM ET. This market will resolve to 'Tamara Zidansek' if Tamara Zidansek advances against Petra Marcinko. This market will resolve to 'Petra Marcinko' if Petra Marcinko advances against Tamara Zidansek. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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.
Prediction market odds and sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and protect their margin, while prediction markets aggregate the beliefs of traders risking real capital on outcomes. For this market, comparing the implied probability on Polymarket to major sportsbook lines can reveal whether one venue views the match outcome differently. Prediction markets tend to be efficient at pricing when volume is high and participants have strong information, though sportsbooks may adjust faster to late-breaking news or injury reports.
On Polymarket, this market is priced through an automated market maker that converts trader activity into real-time probabilities. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Shares representing each outcome trade continuously, and the ratio of shares bought and sold determines the odds you see displayed. As more traders buy one outcome, its price rises and the competing outcome's price falls, creating a self-correcting mechanism. The platform charges a small fee on trades, and settlement occurs after the event concludes and the outcome is verified, at which point winning shares redeem at full value.
This market resolves around Jul 24, 2026, once the Iasi Open match between the two players concludes and the result is verifiable from credible public reporting. The outcome is determined by which player wins the match according to official tournament records. No further conditions apply—the market simply confirms the winner and settles accordingly. Early resolution is possible if the match is cancelled or declared a walkover, in which case the platform will update the outcome based on the official ruling.
Several factors could shift odds before the match concludes. Recent form and head-to-head records between the players often influence trader positioning, as do injury reports or fitness concerns announced close to match day. Court surface preference, weather conditions at the venue, and seeding or ranking changes can all trigger repricing. Major upsets in earlier rounds of the tournament may alter perceptions of player momentum. Additionally, betting syndicates or sharp traders with new information can move the market quickly, so monitoring news and player statements in the days leading up to the match is valuable for tracking sentiment shifts.