Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
BTC Prediction Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on BTC Prediction → |
Polymarket polymarket.com |
0% | 100% | 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
Anhelina Kalinina, the Ukrainian player ranked around 40th on the WTA tour, faces French qualifier Diane Parry in an early-round Roland Garros encounter scheduled for 24 May 2026. The 0% implied probability reflects either a technical settlement condition or genuine uncertainty about match completion, given the seven-day grace period built into the contract terms. Parry, a home-nation player with limited top-100 ranking history, presents a variable opponent; early-round clay matchups often hinge on surface adaptation rather than seeding alone.
Historical context from recent Roland Garros cycles shows that qualifying-round players and lower-ranked challengers advance roughly 35–40% of the time against mid-tier seeded opposition, though Kalinina's clay record and experience advantage typically favour her in such pairings. The current zero probability may signal market illiquidity rather than informed consensus, particularly given USDC settlement mechanics on smaller markets sometimes attract minimal initial liquidity until closer to event dates.
Traders should monitor WTA injury bulletins and official draw confirmations through late May, as Roland Garros scheduling occasionally shifts matches by 24–48 hours due to court availability. Recent Challenger and ITF results from both players in April–May will provide concrete form signals; Kalinina's performance at lower-tier events preceding the tournament will be material. The settlement window closes 31 May at 09:00 UTC, allowing two days post-match for official confirmation, though delayed matches could trigger the 50-50 tie-break clause if play extends beyond 31 May.
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
- 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.
- 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, 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.
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