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 Iga Swiatek Set 1 Winner | 100% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set 1 O/U 8.5 | 100% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set 1 O/U 9.5 | 100% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set 1 O/U 10.5 | 100% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek | 88% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set 2 Winner | 84% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set 2 O/U 8.5 | 70% |
| Completed Match | 50% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set 2 O/U 9.5 | 50% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set 2 O/U 10.5 | 50% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Match O/U 21.5 | 45% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Match O/U 22.5 | 37% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Match O/U 23.5 | 23% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Total Sets: O/U 2.5 | 17% |
| Wimbledon WTA: Alexandra Eala vs Iga Swiatek Set Handicap +/-1.5 | 5% |
Market context
The underlying event is the third-round WTA match between Alexandra Eala and Iga Świątek at Wimbledon, scheduled to start at 02:00 on 4 July 2026. This is their first encounter on grass, despite a 1:1 record from previous meetings on other surfaces, with Świątek having advanced through a three-set victory over Taylor Townsend in the second round[7][9]. The market currently implies a 30% chance that Eala wins and advances, a probability that traders should contextualise against historical precedents where lower-ranked players defeated top-10 opponents on grass in early Wimbledon rounds, though such outcomes remain rare and often hinge on surface-specific form rather than overall ranking[1].
Traders should monitor real-time weather updates for the All England Club, as rain delays could push the match beyond the seven-day settlement window, triggering a 50-50 resolution[3]. Key catalysts include Świątek’s grass-court adaptation metrics, which are yet to be fully established, and Eala’s recent performance trends on fast surfaces, both of which may shift implied probabilities before the match begins[9]. While crypto macro factors like BTC/ETH volatility or USDC funding rates do not directly influence tennis outcomes, whale flows into prediction markets on btc-prediction.bet could temporarily distort pricing if large positions are opened ahead of the event, as seen in recent on-chain activity where funding rates spiked during high-volume settlement windows[1]. Traders must also watch for official WTA announcements regarding player fitness or schedule changes, as any delay beyond the settlement deadline of 10:00 on 10 July 2026 would invalidate the outcome[3].
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
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- 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.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
- 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.
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