Live prediction market odds for Mackenzie McDonald vs. Lloyd Harris. Compare prices across Kalshi and Polymarket.
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MARKET RESOLVEDKalshi / Polymarket
Resolved 2026-04-20
This market resolved on 2026-04-20. Lloyd Harris was the officially declared outcome. Prior to resolution, the market peaked at 99%.
Mackenzie McDonald vs. Lloyd Harris — ATP Tennis match held on 2026-04-20. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
| Candidate |  |  |
|---|---|---|
Lloyd HarrisWINNER | 99% | 100% |
Mackenzie McDonald | 1% | 0% |
Mackenzie McDonald vs. Lloyd Harris was a prediction market event tracked across 2 platforms (Kalshi, Polymarket). Lloyd Harris led the market at 99% implied probability before resolution. Other contenders include Mackenzie McDonald at 1%.
Lloyd Harris held the lead at 99% implied probability heading into resolution. Behind Lloyd Harris, Mackenzie McDonald at 1% were the next closest contenders. Platforms were tightly aligned at a 0.9% spread, suggesting broad consensus on the odds.
Here were the closing odds across Kalshi, Polymarket: Lloyd Harris: 99¢ on Kalshi, 100¢ on Polymarket. Mackenzie McDonald: 1¢ on Kalshi, 0¢ on Polymarket. Platforms were tightly aligned at a 0.9% spread, leaving little room for cross-platform arbitrage.
A price of 99¢ meant the market estimated a 99% chance that Lloyd Harris 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.
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As seen on Financial Times, Guardian and Polymark.et
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Lloyd Harris
99.5% avg
Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.
KalshiIf Lloyd Harris wins the Harris vs McDonald professional tennis match in the 2026 ATP Madrid Qualification Round 1 after a ball has been played, then the market resolves to Yes.
The following market refers to the Harris vs McDonald professional tennis match in the 2026 ATP Madrid Qualification Round 1 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 Lloyd Harris and Mackenzie McDonald in the Madrid Open, Qualification, originally scheduled for April 20, 2026 at 7:00AM ET. This market will resolve to "Harris" if Lloyd Harris wins by 2 or more sets than Mackenzie McDonald, based on the final completed score. Otherwise, it will resolve to "McDonald." If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official ATP results.
