Grass Court Championships: Madison Keys vs Xinyu Wang

Platform comparison

Active sub-markets

Market context

Madison Keys is scheduled to face Xinyu Wang at the Grass Court Championships on 15 June 2026, with the match set for 4:00 AM ET. The 0% implied probability reflects the market's current assessment, though the settlement window extends to 22 June, allowing a seven-day buffer for rescheduling before a 50-50 resolution triggers. The early morning slot and grass-court conditions typical of mid-June tournaments introduce scheduling volatility that traders should monitor closely.

Keys holds a significant career advantage in head-to-head matchups and ranking differential, which historically translates to favouring the higher-seeded player in early-round grass encounters. Wang, ranked substantially lower, would require either a substantial upset or Keys' withdrawal to advance the market meaningfully. Comparable grass-court tournaments from 2024–2025 show that matches involving players with this ranking gap rarely produce surprise results unless injury or late withdrawal occurs.

The critical catalyst is any announcement regarding player fitness or tournament scheduling changes in the 48 hours preceding the match. Grass-court tournaments frequently adjust timetables due to weather or court conditions, and early morning slots are particularly susceptible to delays. Traders should monitor official tournament communications and both players' social media for injury updates. If either player withdraws before the match begins, the market resolves to 50-50; if the match starts but doesn't finish, advancement rules determine the outcome. The settlement deadline of 22 June gives organisers flexibility to reschedule without triggering the tie resolution.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Prediction Today is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Prediction Today?

Zero. Prediction Today routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.