Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
100% | 0% | 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
| Roland Garros WTA: Mirra Andreeva vs Fiona Ferro | 100% YES | 0% NO |
| Completed Match | 100% YES | 0% NO |
| Roland Garros WTA: Mirra Andreeva vs Fiona Ferro Set 1 Winner | 100% YES | 0% NO |
| Roland Garros WTA: Mirra Andreeva vs Fiona Ferro Set 1 O/U 8.5 | 100% YES | 0% NO |
| Roland Garros WTA: Mirra Andreeva vs Fiona Ferro Set 1 O/U 9.5 | 0% YES | 100% NO |
| Roland Garros WTA: Mirra Andreeva vs Fiona Ferro Match O/U 21.5 | 0% YES | 100% NO |
Market context
Mirra Andreeva faces Fiona Ferro in a Roland Garros women's singles match scheduled for 24 May 2026. The Polymarket contract currently prices Andreeva's advancement at 100% on USDC/Polygon, reflecting either overwhelming confidence in the Russian teenager's superiority or minimal liquidity in the conditional token pair. Settlement hinges on a definitive winner within seven days of the scheduled date; any cancellation, tie, or extended delay beyond that window triggers a 50-50 resolution regardless of match circumstances.
Andreeva's trajectory since her 2024 breakthrough—reaching the French Open quarter-finals at age 16—positions her as a rising force on clay. Ferro, now in her early thirties, has competed sporadically in recent seasons following injury setbacks. Historical precedent suggests youth and momentum typically favour Andreeva's profile in such matchups, though Ferro's experience on Roland Garros courts (multiple main-draw appearances) provides a baseline competitiveness. The 100% pricing likely reflects Andreeva's ranking advantage and recent form rather than genuine certainty of outcome.
Traders monitoring this contract should track official Roland Garros scheduling confirmations and any withdrawal announcements from either player in the fortnight before competition. Ferro's fitness status remains material given her injury history; any late withdrawal would trigger the 50-50 resolution clause. Weather disruptions at Roland Garros in late May could also force rescheduling beyond the seven-day window. The current extreme probability leaves minimal arbitrage opportunity unless fresh information emerges regarding player availability or surface conditions affecting clay-court specialists differently.
Methodology
We track Roland Garros WTA: Mirra Andreeva vs Fiona Ferro 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
- 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.
- 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.
- 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.
Trade Roland Garros WTA: Mirra Andreeva vs Fiona Ferro on PolyGram
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