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
Casper Ruud, the Norwegian world number 8 and two-time Roland Garros finalist, faces Hamad Medjedovic of Serbia in the opening round of the 2026 French Open ATP draw. Medjedovic, ranked outside the top 100, enters as a substantial underdog in a best-of-five-set clay-court encounter. The match was originally scheduled for 27 May 2026 at 05:00 ET, with settlement occurring by 3 June 2026. The 0% crowd probability reflects Ruud's established pedigree on clay and his consistent seeding at major tournaments, though such extreme pricing often signals either extreme confidence or thin liquidity in early-stage market formation.
Historical precedent suggests opening-round mismatches at Grand Slams rarely produce upsets when the higher-ranked player is a seeded contender with multiple finals appearances. Ruud's clay-court record—including runs to the French Open final in 2022 and 2023—establishes a baseline expectation that favours him heavily. Medjedovic's career trajectory shows limited evidence of breakthrough performances against top-10 opposition on clay. The settlement mechanism's 50-50 resolution clause for cancellations or delays beyond seven days introduces minor tail risk, though Roland Garros scheduling has remained stable in recent cycles.
Traders should monitor ATP injury bulletins and draw confirmations released by the French Tennis Federation in the week preceding the tournament. Court assignments and weather conditions—particularly rain delays common in late May at Roland Garros—could affect match timing and player preparation. Any withdrawal announcements from either player would trigger immediate contract resolution. Funding rates on USDC-settled tennis derivatives across major prediction platforms typically tighten as match dates approach, reflecting information consolidation around player fitness and form.
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.
- 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.
- 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: Casper Ruud vs Hamad Medjedovic on BTC Prediction
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