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
Sara Sorribes Tormo and Tamara Korpatsch are scheduled to meet in the first round of Roland Garros women's singles on 24 May 2026. The Spanish player, ranked around 40th on the WTA tour, faces the German qualifier Korpatsch, who typically hovers outside the top 100. This early-round matchup carries minimal seeding implications but sits within the unpredictable opening phase where form, surface preference, and recent injury history matter considerably more than ranking points alone.
Sorribes Tormo has shown inconsistent results on clay over the past two seasons, with occasional deep runs offset by early exits at mid-tier events. Korpatsch, a qualifier, enters with lower expectations but has demonstrated resilience in qualifying rounds and occasional upsets on European clay. Historical data from comparable unseeded first-round clay-court clashes suggests roughly 55–65% conversion rates for the higher-ranked player, though the 0% implied probability currently displayed across most platforms (including Polymarket's decimal odds representation) suggests either a late withdrawal, fixture cancellation, or data lag rather than genuine market consensus. Kalshi and Betfair's fractional odds formats sometimes reveal sharper early-market pricing on such matches before aggregation flattens probability estimates.
Traders should monitor the official Roland Garros draw confirmation and any injury bulletins released within 48 hours of the scheduled start. Weather delays are routine at Roland Garros in late May; the settlement window extends to 31 May, providing a seven-day buffer before the 50–50 tie-break resolution triggers. Recent tournament schedules have seen occasional order-of-play shifts, particularly for early-round women's matches, making real-time fixture confirmation essential before settlement approaches.
Methodology
This page compares Roland Garros WTA: Sara Sorribes Tormo vs Tamara Korpatsch specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.
Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.
FAQ
- 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.
- 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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