Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
90% | 10% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
90% | 10% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on PolyGram → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on PolyGram → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on PolyGram → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on PolyGram → |
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 PolyGram.
Active sub-markets
Market context
Casper Ruud faces Roman Safiullin in the opening round of Roland Garros in May 2026, with the market pricing Ruud at 89% to advance. Ruud, a two-time French Open finalist, enters as the clear favourite against Safiullin, a Russian player ranked considerably lower and with limited clay-court pedigree at the ATP level. The 89% probability reflects Ruud's established credentials on the surface and his seeding advantage, though the settlement window extends to early June, allowing for potential delays or scheduling complications.
Historically, first-round matches at Roland Garros between seeded players and unranked or lower-ranked opponents have favoured the seed at roughly this probability band, particularly when the favourite has demonstrated consistent performance on clay. Ruud's record at the tournament—reaching finals in 2022 and 2023—anchors confidence in his ability to navigate early rounds. Safiullin's trajectory on the professional circuit has been gradual; he lacks the tournament wins or ranking stability that would typically narrow the gap against a top-10 clay specialist.
The key variable remains Ruud's form heading into May 2026 and any late withdrawals or injury concerns. Spring clay-court results from Madrid and Rome will provide the most recent form indicators. The seven-day grace period in the settlement terms protects against minor scheduling delays, though Roland Garros rarely experiences significant disruptions. A contrarian angle exists only if Safiullin enters with unexpected ranking gains or if Ruud shows injury signals in the weeks prior; absent those developments, the market consensus reflects the genuine disparity in capability.
Methodology
We track Roland Garros ATP: Casper Ruud vs Roman Safiullin 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
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- Is this market available outside the US?
- PolyGram 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'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 PolyGram?
- Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- 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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