Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Kalshi UK Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Kalshi UK → |
Polymarket polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Kalshi UK → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Kalshi UK → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Kalshi UK → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Kalshi UK → |
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 Kalshi UK.
Active sub-markets
Market context
Tamara Korpatsch and Xinyu Wang are scheduled to meet in the first or early round of Roland Garros on 27 May 2026. The Polymarket contract currently trades at 100% implied probability for Korpatsch, reflecting either extremely lopsided odds or a technical pricing anomaly on the conditional token pair. On Polygon, this represents a USDC settlement mechanism where the winning side's tokens collapse to $1 and the loser's to $0, though the 100% reading suggests either minimal liquidity depth or market participants treating this as a near-certainty outcome.
Korpatsch, a German player ranked outside the top 100 in recent seasons, has competed sporadically on the WTA circuit with limited Grand Slam success. Wang, a Chinese player, similarly occupies the lower tiers of professional tennis. Historical precedent from lower-ranked matchups at Roland Garros shows that seeding, recent form, and surface adaptation matter considerably—clay court specialists often outperform hard court players at the French Open. The 100% probability is unusual for any tennis match involving players of comparable ranking; even heavily favoured players in early rounds typically trade between 70–85% on prediction markets.
Traders should monitor the official Roland Garros draw release and any late withdrawals or injury announcements in the weeks before 27 May. The settlement window closes 3 June at 09:00 UTC, allowing seven days for the match to complete. Any cancellation, retirement mid-match without a winner declared, or delay beyond 3 June triggers a 50-50 resolution. Recent WTA scheduling has been stable, but weather disruptions at Roland Garros remain a material risk factor that could delay proceedings beyond the settlement deadline.
Methodology
We track Roland Garros WTA: Tamara Korpatsch vs Xinyu Wang on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.
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.
FAQ
- Where can I trade this market with the lowest fees?
- On Kalshi UK, 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.
- Is this market available outside the US?
- Kalshi UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK 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 WTA: Tamara Korpatsch vs Xinyu Wang on Kalshi UK
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