Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Sport Prediction Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Sport Prediction → |
Polymarket polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Sport Prediction → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Sport Prediction → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Sport Prediction → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Sport Prediction → |
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 Sport Prediction.
Active sub-markets
Market context
Jelena Ostapenko and Magda Linette are scheduled to meet in the opening rounds of Roland Garros in late May 2026. Ostapenko, the 2017 French Open champion, has maintained a top-20 ranking across the past two seasons despite inconsistent form on clay. Linette, a Polish competitor ranked in the 40s, has shown improved consistency on hard courts but historically struggles on the Roland Garros surface, where her record stands below 40 per cent wins across her career appearances.
The 100 per cent implied probability reflects Ostapenko's substantial seeding advantage and historical dominance in head-to-head records—she leads their career matchup 2–0. However, prediction markets at Roland Garros frequently overweight established rankings when early-round opponents carry legitimate upset potential. Linette's recent performances on clay have been marginal; she failed to advance past qualifying rounds at three consecutive European clay tournaments in spring 2025, suggesting limited momentum into the tournament.
Traders should monitor official draw confirmations and any late withdrawals through the settlement window closing 3 June 2026. Ostapenko's fitness status matters considerably—she withdrew from two warm-up events in 2025 citing minor injuries. The 100 per cent probability leaves minimal margin for match delays or cancellations, which would trigger a 50–50 resolution. Linette's draw position and whether she faces seeded opponents beforehand could affect her physical condition entering this fixture, though such dependencies remain secondary to Ostapenko's clear technical advantage on clay.
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 Sport Prediction, 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
- Is this market available outside the US?
- Sport Prediction 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 does it cost to trade on Sport Prediction?
- Zero. Sport Prediction 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, Sport Prediction 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.
Trade Roland Garros WTA: Jelena Ostapenko vs Magda Linette on Sport Prediction
Live order book, 0% fees, USDC settlement in seconds.
Trade on Sport Prediction →