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
| Roland Garros WTA: Emma Navarro vs Janice Tjen | 100% YES | 0% NO |
| Completed Match | 100% YES | 0% NO |
| Roland Garros WTA: Emma Navarro vs Janice Tjen Set 1 O/U 8.5 | 100% YES | 0% NO |
| Roland Garros WTA: Emma Navarro vs Janice Tjen Set 1 O/U 9.5 | 100% YES | 0% NO |
| Roland Garros WTA: Emma Navarro vs Janice Tjen Set 1 O/U 10.5 | 0% YES | 100% NO |
| Roland Garros WTA: Emma Navarro vs Janice Tjen Total Sets: O/U 2.5 | 0% YES | 100% NO |
Market context
Emma Navarro, the American 23-year-old ranked in the WTA top 15, faces Janice Tjen in the opening round of Roland Garros on 24 May 2026. Navarro has established herself as a consistent performer on clay courts, reaching the French Open second round in 2024 and maintaining a winning record against lower-ranked opponents. Tjen, a qualifier or lower-seeded player, enters as a significant underdog in this matchup. The 99% implied probability reflects Navarro's superior ranking, recent form, and clay-court experience—a reasonable assessment given the disparity in their competitive trajectories.
Historical patterns in WTA first-round matches between seeded players and qualifiers show that upsets occur in roughly 2–4% of cases, with the probability varying by ranking differential and surface familiarity. Navarro's consistent performance record and Tjen's limited Grand Slam exposure align with the market's heavy weighting towards Navarro. However, clay-court tennis introduces variables: surface-specific skill sets, injury susceptibility, and momentum shifts can compress expected margins. The 1% residual probability accounts for withdrawal, injury, or administrative cancellation rather than genuine competitive uncertainty.
Traders should monitor the official Roland Garros draw confirmation and any injury bulletins released by the WTA in the week preceding 24 May. Court assignments and scheduling changes—particularly if the match shifts to an evening slot—can affect player preparation and fatigue levels. Settlement hinges on match completion by 31 May; delays beyond seven days without resolution trigger the 50-50 clause. USDC settlement will execute against the official ATP/WTA result feed, making real-time draw updates and player status announcements the primary catalysts to track.
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.
- 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.
- 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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