Ilkley: Mary Stoiana vs Celine Naef

Platform comparison

Active sub-markets

Market context

The Ilkley tournament fixture between Mary Stoiana and Celine Naef, originally scheduled for 13 June 2026, currently trades at 0% YES on Polymarket's conditional token structure, indicating the market perceives negligible probability of Stoiana advancing. The USDC-denominated contract on Polygon reflects either substantial confidence in Naef's superiority or uncertainty about match completion itself, given the settlement window extends to 20 June—allowing seven days for rescheduling before triggering the 50-50 resolution clause.

Historical precedent suggests such extreme pricing often reflects ranking disparities or recent form divergence between players. Stoiana and Naef occupy different tiers within professional women's tennis; comparative ATP/WTA rankings and recent tournament results would clarify whether this represents genuine skill differential or market inefficiency. Grass-court specialists typically show volatile performance at Ilkley, where surface-specific preparation and recent match sharpness matter considerably more than year-round rankings.

Traders should monitor official WTA communications regarding the match schedule, as grass-court tournaments frequently experience weather-related delays or cancellations. Any withdrawal announcements from either player, injury updates, or tournament draw confirmations in early June would materially shift conditional token valuations. The settlement mechanics reward traders who identify either unexpected match postponements (triggering 50-50 resolution) or genuine upset potential that the current 0% pricing has entirely discounted.

Methodology

We track Ilkley: Mary Stoiana vs Celine Naef 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Scam?, 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?

Polymarket Scam? 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Scam? triggers a quick verification flow that finishes in 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.