Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
BTC Prediction Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on BTC Prediction → |
Polymarket polymarket.com |
100% | 0% | 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
Martin Landaluce, the Spanish qualifier ranked outside the top 200, faces Czech player Vit Kopriva in the opening round of Roland Garros on 28 May 2026. The match is scheduled for 5:00 AM ET, a graveyard slot typical of early-round qualifying or main draw encounters on the outer courts. Both players are relatively obscure in ATP terms; Landaluce has competed primarily on the Challenger circuit, whilst Kopriva, also ranked in the 150–250 range, has shown inconsistent results at tour level. The 100% crowd-implied probability suggests near-certainty that the match will be played and completed, with one player advancing cleanly.
Historical precedent for matches between players of this ranking tier shows completion rates above 95% at Grand Slams, where scheduling infrastructure and player commitment are highest. Retirements and walkovers occur in roughly 3–5% of such encounters; cancellations due to weather or injury are rarer still at Roland Garros given the clay surface's resilience and the tournament's contingency planning. The settlement window extends to 4 June, providing a six-day buffer beyond the scheduled date—sufficient to accommodate a single rain delay without triggering the 50-50 tie-break clause.
Traders should monitor the official Roland Garros draw confirmation and any injury bulletins released by the ATP in the week prior to 28 May. Court assignments and weather forecasts for Paris will become material 48 hours before play. Given the early morning slot and the players' limited public profiles, on-chain volume on this market is likely to remain modest; USDC settlement will execute against the official ATP result once confirmed.
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
- 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 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.
- 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.
Trade Roland Garros ATP: Martin Landaluce vs Vit Kopriva on BTC Prediction
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