Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner | 100% |
| Completed Match | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 1 O/U 8.5 | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 1 Winner | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 2 Winner | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 2 O/U 8.5 | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set Handicap +/-1.5 | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 1 O/U 9.5 | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 2 O/U 9.5 | 100% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Total Sets: O/U 2.5 | 0% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Match O/U 21.5 | 0% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Match O/U 22.5 | 0% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 1 O/U 10.5 | 0% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Match O/U 23.5 | 0% |
| ITF Leipzig: Caijsa Hennemann vs Valentina Steiner Set 2 O/U 10.5 | 0% |
Market context
Polymarket is pricing the contract at **100% YES**, which implies the market is treating Caijsa Hennemann’s advance as effectively certain on the current order book, with settlement in USDC on Polygon through conditional tokens. For a trader, that means the contract is no longer a live view on match quality so much as a check on whether the on-chain market and the tennis result stay aligned by the settlement window.
The historical frame supports that reading: Hennemann and Steiner had no prior head-to-head before Leipzig, but the pre-match data pointed towards Hennemann anyway. Hennemann was ranked around WTA 267 versus Steiner around WTA 544, and recent match data showed Hennemann with a stronger 2026 win rate and broader tour-level experience than Steiner[13][2][18]. Tennis Temple also listed Hennemann ahead on live ranking and the pair’s Leipzig meeting was ultimately completed with Hennemann winning 2-0, which is the sort of outcome that a 100% market often reflects once the bracket situation becomes clear[2][6].
What matters now is not the abstract probability but the settlement mechanics: the market resolves to Hennemann if she advances, to Steiner if Steiner advances, and to 50-50 if the match is cancelled, tied, or delayed beyond seven days without a winner. The main catalysts to watch are official draw and order-of-play updates, any late court or weather disruption at the ITF Leipzig event, and score reporting from tournament or tracker feeds if the match is interrupted; tennis listing sites already showed the fixture with a scheduled start on 7 August and live status pages tied to the same pairing[10][14][3].
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- 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%.
Trade ITF Leipzig: Caijsa Hennemann vs Valentina Steiner on Kalshi UK
Live order book, 0% fees, USDC settlement in seconds.
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