Live prediction market odds for Joao Fonseca vs. Casper Ruud. Compare prices across Kalshi.
Join our Discord for breaking news alerts, driven by real-time movements in prediction markets.
MARKET RESOLVEDKalshi
Resolved 2026-05-31
This market resolved on 2026-05-31. Joao Fonseca was the officially declared outcome. Prior to resolution, the market peaked at 99%.
Joao Fonseca vs. Casper Ruud — ATP Tennis match held on 2026-05-31. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
| Candidate |  |
|---|---|
Joao FonsecaWINNER | 99% |
Casper Ruud | 1% |
Joao Fonseca vs. Casper Ruud was a prediction market event tracked across 1 platform (Kalshi). Joao Fonseca led the market at 99% implied probability before resolution. Other contenders include Casper Ruud at 1%.
Joao Fonseca held the lead at 99% implied probability heading into resolution. Behind Joao Fonseca, Casper Ruud at 1% were the next closest contenders. Platforms were tightly aligned at a 0.0% spread, suggesting broad consensus on the odds.
Here were the closing odds across Kalshi: Joao Fonseca: 99¢ on Kalshi. Casper Ruud: 1¢ on Kalshi. Platforms were tightly aligned at a 0.0% spread, leaving little room for cross-platform arbitrage.
A price of 99¢ meant the market estimated a 99% chance that Joao Fonseca would be the outcome. Traders who bought at 99¢ and held through resolution received $1.00 per share — a 1% return on their position. Those on the wrong side received $0.
Build a custom bot or arb alert system for the “Joao Fonseca vs. Casper Ruud” event. All for free.
As seen on Financial Times, Guardian and Polymark.et
Used by builders and traders in our 3K+ Discord community
Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.
KalshiIf Casper Ruud wins the Ruud vs Fonseca professional tennis match in the 2026 French Open Men Singles Round Of 16 after a ball has been played, then the market resolves to Yes.
The following market refers to the Ruud vs Fonseca professional tennis match in the 2026 French Open Men Singles 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 Casper Ruud and Joao Fonseca in the Roland Garros ATP, originally scheduled for May 31, 2026 at 5:00AM ET. This market will resolve to 'Casper Ruud' if Casper Ruud advances against Joao Fonseca. This market will resolve to 'Joao Fonseca' if Joao Fonseca advances against Casper Ruud. 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.
Joao Fonseca
99.0% avg
