Nottingham Open: Ann Li vs Kimberly Birrell

Platform comparison

Active sub-markets

Market context

Ann Li and Kimberly Birrell are scheduled to meet in the opening round of the Nottingham Open on 16 June 2026. The 0% YES probability reflected on Polymarket suggests traders are pricing in either match cancellation or a near-certain Birrell victory, though the extreme probability warrants scrutiny given the settlement window extends to 23 June—allowing seven days for rescheduling before the 50-50 tie-break clause activates. On-chain liquidity in this conditional token pair remains thin, typical for lower-ranked WTA matchups where USDC depth concentrates around major tournaments.

Historical precedent matters here: grass-court openers frequently see withdrawals or late scratches, particularly for players managing injury concerns ahead of Wimbledon. Li, ranked outside the top 100 in recent seasons, has shown inconsistent availability at tier-two events, whilst Birrell's recent form and seeding status (if any) would typically favour her in early-round pricing. The Nottingham event's scheduling against the broader grass-court calendar—with Queen's Club and Eastbourne running concurrently—creates fixture congestion that occasionally triggers player withdrawals.

Traders should monitor official WTA entry lists and injury reports through early June, as late withdrawals often precede formal announcements by 48 hours. Birrell's participation in warm-up tournaments immediately before Nottingham would signal confidence in her fitness and availability. Any announcement regarding either player's Wimbledon preparation or injury status could shift the conditional token price materially, though the current 0% floor suggests the market is already pricing in substantial cancellation risk or has simply seen minimal trading activity at this contract depth.

Methodology

We track Nottingham Open: Ann Li vs Kimberly Birrell 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

Where can I trade this market with the lowest fees?

On Kalshi 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.

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 Kalshi UK?

Zero. Kalshi 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 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.