Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
BTC Prediction Pick polygram.ink |
39% | 61% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on BTC Prediction → |
Polymarket polymarket.com |
39% | 61% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on BTC Prediction → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on BTC Prediction → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on BTC Prediction → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on BTC Prediction → |
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 BTC Prediction.
Active sub-markets
Market context
Juan Manuel Cerundolo, the Argentine left-hander ranked outside the top 100, faces Italian serve-and-volley specialist Matteo Berrettini in the opening rounds of Roland Garros 2026. The match is scheduled for 1 June at 5:00 AM ET, with settlement contingent on a decisive result by 8 June. The 40% implied probability for Cerundolo reflects the structural disadvantage of a lower-ranked player against Berrettini, whose big serve and court positioning have historically troubled baseline-heavy opponents on clay.
Berrettini's clay-court record provides the primary historical anchor. Despite his dominance on faster surfaces, he has struggled to convert clay opportunities into deep runs, reaching the French Open quarter-finals only once (2021). Cerundolo, conversely, has shown resilience in qualifying rounds and lower-tier events but lacks the tournament pedigree or ranking points to suggest upset potential against a seeded opponent. Head-to-head records and recent form sheets from ATP databases will clarify whether either player has momentum shifts or injury concerns heading into the tournament.
Traders should monitor official Roland Garros draw confirmations and ATP injury bulletins through late May, as withdrawal or schedule adjustments could trigger the 50-50 tie resolution clause. Weather delays are material on clay; extended rain could push the match beyond the seven-day window. USDC settlement will execute once the ATP officially confirms the winner, with no dependency on crypto macro conditions or funding rate volatility—this market resolves purely on tennis outcome.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — are listed with their platform attributes, because they operate off-chain and a 1:1 comparison of contract mechanics isn't possible.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- Where can I trade this market with the lowest fees?
- On BTC Prediction, 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?
- BTC Prediction 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 does it cost to trade on BTC Prediction?
- Zero. BTC Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, BTC Prediction triggers a quick verification flow that finishes in minutes.
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