Live prediction market odds for Casper Ruud vs. Stefanos Tsitsipas. Compare prices across Kalshi and Polymarket.
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MARKET RESOLVEDKalshi / Polymarket
Resolved 2026-04-28
This market resolved on 2026-04-28. Casper Ruud was the officially declared outcome. Prior to resolution, the market peaked at 86%.
Casper Ruud vs. Stefanos Tsitsipas — ATP Tennis match held on 2026-04-28. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
| Candidate |  |  |
|---|---|---|
Casper RuudWINNER | 99% | 72% |
Stefanos Tsitsipas | 1% | 28% |
Casper Ruud vs. Stefanos Tsitsipas was a prediction market event tracked across 2 platforms (Kalshi, Polymarket). Casper Ruud led the market at 86% implied probability before resolution. Other contenders include Stefanos Tsitsipas at 15%.
Casper Ruud held the lead at 86% implied probability heading into resolution. Behind Casper Ruud, Stefanos Tsitsipas at 15% were the next closest contenders. The 27.0% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.
Here were the closing odds across Kalshi, Polymarket: Casper Ruud: 99¢ on Kalshi, 72¢ on Polymarket. Stefanos Tsitsipas: 1¢ on Kalshi, 28¢ on Polymarket. The 27.0% spread across platforms highlights where markets disagreed — a gap traders can exploit by buying low on one platform and selling high on another.
A price of 86¢ meant the market estimated a 86% chance that Casper Ruud would be the outcome. Traders who bought at 86¢ and held through resolution received $1.00 per share — a 16% return on their position. Those on the wrong side received $0.
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Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.
KalshiIf Stefanos Tsitsipas wins the Tsitsipas vs Ruud professional tennis match in the 2026 ATP Madrid Round Of 16 after a ball has been played, then the market resolves to Yes.
The following market refers to the Tsitsipas vs Ruud professional tennis match in the 2026 ATP Madrid Round Of 16 after a ball has been played. If the match does not occur (signaled by a ball being played) due to a player injury, walkover, forfeiture, or any other cancellation (all before the match starts), the market will resolve to a fair price in accordance with the rules. If this match is postponed or delayed, the market will remain open and close after the rescheduled match has finished (within two weeks).
PolymarketThis market refers to the tennis match between Stefanos Tsitsipas and Casper Ruud in the Madrid Open, originally scheduled for April 28, 2026 at 8:00AM ET. This market will resolve to 'Stefanos Tsitsipas' if Stefanos Tsitsipas advances against Casper Ruud. This market will resolve to 'Casper Ruud' if Casper Ruud advances against Stefanos Tsitsipas. 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 ATP Tour. A consensus of credible reporting may also be used.
Casper Ruud
85.5% avg
