Polymarket$3.59BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$411.95MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$27.82MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Today
If Zhizhen Zhang wins the Zhang vs Mannarino professional tennis match in the 2026 ATP Miami Round Of 128 after a ball has been played, then the market resolves to Yes.
As of March 19, 2026, the Kalshi odds for Will Zhizhen Zhang win the Zhang vs Mannarino : Round Of 128 match? are: Adrian Mannarino: 51%, Zhizhen Zhang: 50%. These probabilities are derived from real-money trading and update in real time.
Will Zhizhen Zhang win the Zhang vs Mannarino : Round Of 128 match? is currently available on Kalshi. It is also available on Polymarket — compare odds across both platforms on our cross-platform comparison page.
Prediction market odds reflect the aggregate opinion of traders who risk real money on outcomes. The price of a share (e.g., 65¢) represents the market's implied probability (65%). Prices move as traders buy and sell based on new information, polls, and analysis.
