Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Best Prediction Markets Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Best Prediction Markets → |
Polymarket polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Best Prediction Markets → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Best Prediction Markets → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Best Prediction Markets → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Best Prediction Markets → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Best Prediction Markets.
Active sub-markets
| Lexus Eastbourne Open: Jelena Ostapenko vs Panna Udvardy Set 1 O/U 8.5 | 100% Over | 0% Under |
| Lexus Eastbourne Open: Jelena Ostapenko vs Panna Udvardy Set 2 O/U 8.5 | 0% Over | 100% Under |
| Lexus Eastbourne Open: Jelena Ostapenko vs Panna Udvardy Match O/U 22.5 | 100% Over | 0% Under |
| Lexus Eastbourne Open: Jelena Ostapenko vs Panna Udvardy Set 1 O/U 10.5 | 0% Over | 100% Under |
| Lexus Eastbourne Open: Jelena Ostapenko vs Panna Udvardy Set 2 Winner | 100% Ostapenko | 0% Udvardy |
| Lexus Eastbourne Open: Jelena Ostapenko vs Panna Udvardy Set Handicap +/-1.5 | 0% Ostapenko | 100% Udvardy |
Market context
Jelena Ostapenko faces Panna Udvardy in the Lexus Eastbourne Open Round of 16, a professional tennis match scheduled for 6:00 AM ET on 24 June 2026 at the grass courts in Eastbourne, Great Britain. The current prediction-market implied probability sits at a definitive 100% YES that Ostapenko advances, a figure that starkly diverges from sportsbook lines offering her at 1.25 odds (roughly 80% implied probability) and analyst consensus which, while favouring the Latvian, acknowledges the volatility of grass-court upsets.
Historical precedents in WTA grass tournaments reveal that 100% implied probabilities are exceptionally rare and often signal a mispricing rather than certainty, as seen in comparable cases where lower-ranked players secured walkovers or retired opponents in early rounds. Ostapenko’s recent form shows a win against Maria Camila Osorio Serrano but a loss to Anhelina Kalinina, suggesting she is not in invincible territory despite the market’s absolute confidence, a pattern that mirrors past Eastbourne matches where top seeds were unexpectedly eliminated.
Traders must monitor live updates for any pre-match injury announcements or schedule changes, as the tournament rules state that cancellations before the first ball is played resolve to a fair price rather than a binary outcome. Recent coverage from Last Word on Sports highlights Ostapenko’s status as a key player on Day 3, yet the dependency on her physical readiness remains critical, with any retirement during the match triggering settlement based on completed play rather than the initial 100% prediction.
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 Best Prediction Markets, which mirrors the Polymarket order book directly.
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 Best Prediction Markets, 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?
- Best Prediction Markets 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 does it cost to trade on Best Prediction Markets?
- Zero. Best Prediction Markets routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, Best Prediction Markets 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.
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