Lexus Eastbourne Open: Janice Tjen vs Caty McNally

Platform comparison

Active sub-markets

Market context

The real-world event is a women’s singles tennis match between Janice Tjen and Caty McNally at the Lexus Eastbourne Open, set for 5:00 AM ET on 22 June 2026 at Devonshire Park in Eastbourne, Great Britain. This prediction market settles on which player advances: YES means Janice Tjen wins the match and moves forward, while NO means Caty McNally does. A YES share is a bet that the stated outcome—Tjen advancing—will occur; a NO share bets it will not. The market currently shows a 100% crowd-implied probability for YES, suggesting near-universal confidence in Tjen’s victory, though the settlement window remains open until 29 June 2026.

Historically, 100% probabilities in tennis prediction markets have rarely held when matches are played on grass, where surface variability and player form can shift outcomes unexpectedly. In the 2025 Eastbourne Open, several matches saw pre-match odds collapse after players suffered minor injuries or faced unseeded opponents with strong grass-court records, such as the upset of a top-10 player by an unranked qualifier in the second round. These cases show that even overwhelming crowd confidence can be overturned by late developments, making the current 100% YES reading a signal to monitor for any sudden changes rather than a guaranteed outcome.

Traders should watch for official WTA announcements regarding player fitness, match start times, and any delays beyond the seven-day cancellation window, as these directly affect settlement. The WTA’s official tournament overview confirms the event runs from 22–27 June on grass, with singles draws of 32 players[2]. Recent news from Southern Railway notes matches typically begin at 11:00 AM local time, though the Tjen-McNally match is scheduled earlier[1]. Any delay in the match start, injury reports, or withdrawal notices before 29 June could alter the market’s resolution, so checking the WTA’s daily schedule and live scores is essential[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Lexus Eastbourne Open: Janice Tjen vs Caty McNally across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Prediction Market UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Market UK, 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.

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.

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.

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.