Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
0% | 100% | 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
Polymarket is currently pricing this Roland Garros qualifying match at 0% YES, so the contract is effectively sitting at a null bid despite the scheduled Arthur Fery v Pedro Martinez fixture. Because settlement is tied to the actual advance, not just the start of play, the market on Polygon using USDC and conditional tokens will only pay out on a completed winner; if the match is not played, or is left unresolved beyond the seven-day window, it resolves 50-50.
That 0% read is best compared with the underlying tennis context rather than the headline price. Martinez is the more established clay-court player, and recent market and preview pages have leaned his way, with Tipstop citing odds around 1.58 for Martinez against 2.27 for Fery. Sofascore listed the match for Court 10 in Paris on 20 May at 14:00 UTC, which means the main risk for traders is not abstract strength, but whether the fixture is actually completed inside the resolution window.
The key catalysts are practical: official order-of-play updates, any rain or schedule compression at Roland Garros, and whether either player is forced into a retirement or walkover scenario. The market description matters here because a match that starts but is not finished can still resolve on the advancing player, while a match that is cancelled or drifts beyond 27 May without a winner pushes the contract to 50-50. Recent listing pages from Sofascore and betting exchanges suggest the contest was expected to go ahead, but traders still need to watch for late tournament changes rather than rely only on pre-match odds.
Methodology
This page reviews Roland Garros, Qualification ATP: Arthur Fery vs Pedro Martinez across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.
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
- Where can I trade this market with the lowest fees?
- On PolyGram, 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?
- 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.
- 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.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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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