Ilkley: Alicia Dudeney vs Himeno Sakatsume

Platform comparison

Active sub-markets

Market context

Alicia Dudeney and Himeno Sakatsume are scheduled to compete in the Ilkley grass-court tournament on 8 June 2026, with the match originally set for 4:00 AM ET. The settlement window closes on 15 June, allowing a seven-day buffer for rescheduling or completion. The current 100% implied probability for Dudeney's advancement reflects either missing historical data on Sakatsume's recent form or a significant disparity in ranking between the two players at the time of market creation. For traders building conditional logic around this fixture, the extreme probability warrants verification against current WTA rankings and recent head-to-head records, as grass-court tournaments frequently produce upsets that contradict seeding expectations.

Ilkley's grass-court surface introduces volatility that programmable traders should factor into their models. Recent WTA scheduling announcements typically confirm player participation 10–14 days before tournament starts, making early June the critical window for withdrawal or injury news. Traders automating orders should monitor official WTA communications and player social media for withdrawal signals, particularly given the compressed timeline between Wimbledon qualifying and main-draw play. The 4:00 AM ET start time suggests a qualifying or early-round slot; if either player advances to later rounds, scheduling conflicts could trigger delays beyond the seven-day threshold, converting the market to 50-50 resolution.

The resolution mechanics reward precision: a match begun but abandoned mid-play defaults to 50-50 if no winner is determined, whilst cancellation without rescheduling within seven days also triggers a split. Traders should integrate fixture-status feeds and live-score APIs to detect early-stage withdrawals or weather delays that might activate these contingencies before settlement.

Methodology

We track Ilkley: Alicia Dudeney vs Himeno Sakatsume on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

Is this market available outside the US?

Polymarket App UK 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 Polymarket App UK?

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

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.