Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 2 O/U 8.5 | 100% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 2 Winner | 100% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 1 O/U 8.5 | 100% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 1 O/U 9.5 | 100% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 1 O/U 10.5 | 100% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Match O/U 21.5 | 98% |
| Completed Match | 50% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Total Sets: O/U 2.5 | 50% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Game Spread +/-4.5 | 50% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Match O/U 22.5 | 50% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Match O/U 23.5 | 50% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller | 31% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set Handicap +/-1.5 | 2% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 1 Winner | 0% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 2 O/U 9.5 | 0% |
| US Open, Qualification ATP: Coleman Wong vs Elmer Moeller Set 2 O/U 10.5 | 0% |
Market context
Coleman Wong’s qualifying match against Elmer Møller sits in a fairly standard ATP Open-qualifying setup: a seeded player with the better ranking, but not a dominant one. Wong was listed around ATP No. 93 and seeded second in the draw, while Møller was around No. 172 and unseeded, which helps explain why the market is still only pricing Wong at 31% despite him being the higher-rated player. The pair had no previous head-to-head, so the market is mostly reading draw position, ranking gap, and first-round volatility rather than any direct matchup edge.
For traders, the main catalysts are simple but binary: whether the match is actually completed inside the settlement window and whether the result is formally recorded by the US Open draw and score feed. The men’s qualifying draw placed Wong and Møller in the first round, and match listings on 24 August showed the fixture as scheduled on Court 5, with no pre-existing head-to-head to anchor expectations. If the match is delayed, suspended, or removed from the schedule, the contract’s fallback rules matter more than the on-court scoreline, since a non-played or unresolved match by 7 September settles 50-50. US Open qualifying is also played on outdoor hard courts in New York, so late-summer conditions can still nudge serve hold rates and upset risk.
On the crypto side, the contract’s USDC settlement means the practical market question is less about price drift in BTC or ETH than about whether broader digital-asset risk appetite is supportive of liquidity and positioning. Recent on-chain yield data shows USDC lending rates around the mid-4% to low-5% area and ETH perpetual funding close to flat, which points to a relatively neutral leverage backdrop rather than an overheated speculative tape.
Methodology
This page reads US Open, Qualification ATP: Coleman Wong vs Elmer Moeller on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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.
UK Frequently Asked Questions
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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