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
Tereza Valentova and Magda Linette are scheduled to meet in the first or second round of Roland Garros in May 2026. The current crowd-implied probability sits at 0% for Valentova, suggesting near-certainty around a Linette victory. This extreme positioning warrants scrutiny, particularly given the settlement window extends to 31 May—allowing seven days beyond the scheduled 24 May date for match completion before a 50-50 resolution triggers.
Linette has established herself as a consistent WTA competitor with multiple Grand Slam appearances and a career ranking peak in the top 40. Valentova, by contrast, remains a lower-ranked challenger on the professional circuit. Historical precedent suggests the ranking differential alone justifies favouring Linette; however, the 0% probability assigned to Valentova reflects not just form disparity but near-total dismissal of upset potential. On clay courts specifically, where Roland Garros is played, lower-ranked players occasionally find conditions and matchup dynamics that disrupt seeding expectations.
Traders should monitor both players' qualifying results and warm-up tournament performances in the weeks preceding Roland Garros, as these will clarify current fitness and form. Linette's recent injury history and court-surface preferences merit tracking through official WTA communications and draw announcements. The seven-day buffer for match completion also introduces operational risk; weather delays or scheduling conflicts at Roland Garros could force resolution into the 50-50 zone if play extends beyond 31 May without a decisive outcome. Current odds offer minimal margin for Valentova backers, but the extreme consensus positioning creates a potential contrarian angle if clay-court form data shifts materially closer to the tournament.
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 PolyGram, which mirrors the Polymarket order book directly.
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.
- 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 fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
Trade Roland Garros WTA: Tereza Valentova vs Magda Linette on PolyGram
Live order book, 0% fees, USDC settlement in seconds.
Trade on PolyGram →