TOTAL VOLUME:
$69.5b
24H VOL:
$484,842,814
24H TRANSACTIONS:
665,968,069
OPEN INTEREST:
$1,664,094,031
640,972
Markets across
13,915
events
MATCHED EVENTS:
1,210
PLATFORM COVERAGE:
4
Polymarket:
49%
VS.
Kalshi:
51%
Time left: 06d:06h:20m
Eala vs. Rybakina: Set 1 Games O/U 10.5
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Intro
This market tracks the outcome of the professional tennis match between Alexandra Eala and Elena Rybakina in the 2026 Berlin Round of 16 Grass Court Championships. Aggregated across Polymarket and Kalshi, the consensus probability for Elena Rybakina to win the match stands at 99.0%. The match is scheduled for June 18, 2026 at 11:30 AM ET, with resolution determined by official match results once play begins. Watch for the match completion on June 18 to confirm the final outcome.
PredictionHero - Resolution Divergence Alerts (RDA)
Divergence Detected
Issue:
Kalshi and Polymarket define match resolution scope differently. Kalshi resolves on any ball being played; Polymarket distinguishes between full normal completion (Completed Match market) and advancement by any means (Winner market), with different handling of retirements, walkovers, and cancellations.Hero Tip:
Do not assume Kalshi Yes equals Polymarket Completed Match Yes. A retirement or default after play begins triggers Kalshi Yes and Polymarket Winner resolution, but Polymarket Completed Match No. Pre-match walkovers are unaddressed by Kalshi but resolve 50-50 on Polymarket. Always verify the specific reason for match conclusion before settling.Critical Divergence Points:
Kalshi:
Binary Yes/No based on whether a ball is played. Resolves Yes if either player wins after a ball has been played. No explicit rules for walkovers, retirements, cancellations, or ties. Key Quote: 'If Elena Rybakina wins the Eala vs Rybakina professional tennis match in the 2026 Berlin Round Of 16 after a ball has been played, then the market resolves to Yes.'Polymarket (Completed Match):
Binary Yes/No. Resolves Yes only if all games and sets are completed through normal play. Resolves No for any forfeit, walkover, retirement, cancellation, tie, or delay beyond 7 days without a winner. Key Quote: 'This market will resolve to Yes if all games and sets required to determine a match winner under governing body or event organizer rules are played to completion through normal play. Otherwise, if the match is not completed for any reason, it will resolve to No.'Polymarket (Winner):
Categorical (player name or 50-50). Resolves to advancing player if match begins but is not completed due to retirement, default, or disqualification. Resolves 50-50 for cancellation, tie, 7-day delay, or pre-match walkover. Key Quote: '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.'
Polymarket
This market refers to the tennis match between Alexandra Eala and Elena Rybakina in the Grass Court Championships, originally scheduled for June 18, 2026 at 11:30AM ET. This market will resolve to 'Alexandra Eala' if Alexandra Eala advances against Elena Rybakina. This market will resolve to 'Elena Rybakina' if Elena Rybakina advances against Alexandra Eala. 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.
Kalshi
This event covers the professional tennis match between Alexandra Eala and Elena Rybakina in the 2026 Berlin Round of 16. Resolution requires that a ball be played in the match; if the match does not occur before play begins due to injury, walkover, forfeiture, or other cancellation, the market will resolve to a fair price per standard rules. Should the match be postponed or delayed, the market remains open and will close following the rescheduled match completion, provided this occurs within two weeks of the original date.
Frequently asked questions
Prediction markets and sportsbooks price events differently because they operate under distinct incentive structures. Sportsbooks set odds to balance liability and extract a margin; prediction markets let traders directly stake capital on outcomes, creating peer-to-peer pricing. Prediction markets often react faster to new information—injuries, weather, lineup changes—because traders profit immediately from accurate pricing. Sportsbooks may lag behind or shade odds to manage risk. For this match, comparing this market's implied probability to major sportsbook lines can reveal arbitrage opportunities or signal where professional bettors see value.
Kalshi and Polymarket can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform attracts different trader demographics, liquidity pools, and regulatory frameworks. Kalshi operates under CFTC oversight with strict contract design, while Polymarket uses AMM mechanics that can create slippage at scale. Order flow timing, position limits, and fee structures also drive wedges between venues. If one platform sees a large buy order before the other, prices can diverge for hours. Monitoring both simultaneously helps you identify temporary mispricings and understand which platform's traders are more informed on grass court tennis dynamics.
This market resolves around Jun 25, 2026, once the match concludes and the result is verifiable from credible public sources. The outcome will reflect the official tournament record—whether Eala or Rybakina advances from their grass court encounter. No ambiguity exists around the determination; the event is a single, discrete match with a binary result. Traders holding positions through resolution will see their contracts settle based on the verified winner.
Injury reports, recent grass court form, head-to-head records, and draw positioning all influence trader sentiment before the match. Warm-up tournament results—especially on grass—can shift implied probabilities sharply. Weather forecasts for match day may favor one player's style. Betting syndicates or professional traders entering large positions can trigger rapid repricing on both platforms. Real-time match flow—early breaks, momentum shifts, set outcomes—will drive intraday volatility if this market remains open during play. Monitor news feeds and platform activity closely to catch early signals.
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