Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Sport Prediction Pick polygram.ink |
73% | 27% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Sport Prediction → |
Polymarket polymarket.com |
73% | 27% | 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
Facundo Acosta, the Argentine qualifier ranked outside the top 100, faces American prospect Learner Tien in the opening round of Roland Garros on 28 May 2026. The match pits a journeyman clay-court grinder against a rising talent still establishing consistency on the professional circuit. Acosta has built his career on lower-tier events and qualifying runs, whilst Tien, despite his youth, has begun accumulating main-draw experience at Grand Slams. The 39% implied probability for Acosta reflects the conventional expectation that a higher-ranked player or one with more recent ATP exposure would advance, though Acosta's status as a qualifier introduces genuine uncertainty about seeding and draw positioning.
Historical context suggests qualifier-versus-ranked-player matches at Roland Garros favour the seeded or higher-ranked entrant roughly 65–70% of the time, though clay-court specialists who reach the main draw through qualifying often exceed expectations. Acosta's previous Grand Slam appearances and Tien's limited clay résumé will determine whether the Argentine's experience on the surface outweighs ranking differentials. Recent form matters considerably: if either player has competed in the preceding weeks on European clay, that trajectory becomes a critical signal for traders.
Traders should monitor official Roland Garros draw confirmations and any late withdrawals that might alter seeding or scheduling. Weather delays are routine at Roland Garros in late May, though the settlement window extends seven days beyond the scheduled date, providing buffer for rescheduling. Injury reports or coaching changes announced in the week before play could shift the match dynamics materially.
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.
- 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 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 ATP: Facundo Acosta vs Learner Tien on Sport Prediction
Live order book, 0% fees, USDC settlement in seconds.
Trade on Sport Prediction →