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 |
|---|---|
| Wimbledon WTA: Alexandra Eala vs Maya Joint | 100% |
| Completed Match | 100% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Total Sets: O/U 2.5 | 100% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 2 Winner | 100% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Match O/U 21.5 | 100% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 1 O/U 8.5 | 100% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Match O/U 22.5 | 100% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 2 O/U 8.5 | 0% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 1 Winner | 0% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set Handicap +/-1.5 | 0% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 2 O/U 9.5 | 0% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 1 O/U 9.5 | 0% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 2 O/U 10.5 | 0% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Match O/U 23.5 | 0% |
| Wimbledon WTA: Alexandra Eala vs Maya Joint Set 1 O/U 10.5 | 0% |
Market context
Alexandra Eala faces Maya Joint in the second round of the 2026 Wimbledon WTA Championships, a rematch of their unforgettable Eastbourne final from a year ago where Joint secured a decisive victory. Eala has already earned her place in this contest with an emphatic 6-1, 6-2 win over Renata Zarazua, marking her first career main-draw triumph at the All England Club after exiting in the opening round during her debut last year. The match is scheduled for Thursday, 2 July, though the specific court and start time remain unconfirmed until the order of play is released.
Historical precedent in tennis suggests that a 100% crowd-implied probability for a specific player advancing is exceptionally rare and often signals a mispricing, as even dominant favourites face injury risks, weather delays, or unexpected tactical shifts. Comparable cases from recent WTA tournaments show that matches involving rematches of previous finals frequently produce volatile outcomes, with the player seeking redemption often overcoming past psychological barriers to secure a breakthrough win.
Traders should monitor the official order of play release for confirmed court assignments and start times, as delays or changes could impact player preparation and momentum. Additionally, watch for any pre-match injury announcements or weather updates from Wimbledon officials, which could alter the match conditions significantly. Recent WTA coverage highlights the intensity of this rematch, noting Eala’s strong form and Joint’s resilience, making both players credible contenders despite the current market consensus.
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 — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
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
- 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.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
Trade Wimbledon WTA: Alexandra Eala vs Maya Joint on BTC Prediction
Live order book, 0% fees, USDC settlement in seconds.
Open live market →