Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on PolyGram → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on PolyGram → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on PolyGram → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on PolyGram → |
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 PolyGram.
Active sub-markets
Market context
Jil Teichmann and Petra Marcinko were due to meet in Rabat in the WTA event, with the market effectively pricing a Teichmann win at 0% implied probability and leaving Marcinko as the clear favourite by default. That is a very strong consensus signal, but it also creates an obvious contrarian angle: if the market has simply been slow to catch up with the draw or a late withdrawal, the only practical value sits on the underdog side rather than on a non-existent Teichmann bid. On the results available, Marcinko has already had the better of the matchup, with Tennis Ratio showing a 1-0 head-to-head edge, and she also advanced from the Rabat semi-final in straight sets, which is the sort of form line traders tend to anchor to in a small-field WTA clay event.
For comparable cases, low-liquidity tennis markets often overstate certainty when one player has already played and won the same week, while the other side is either injured, withdrawn, or being flagged as unavailable by schedule feeds. Sofascore listed the fixture for 22 May at Centre Court in Rabat, while Kalshi’s market language tied the event to the Rabat semi-final, so traders should watch for any official tournament update, rescheduling, or retirement note before the settlement window closes on 29 May. The key catalyst is whether the match was actually completed and by whom; if it was not played, or if completion was pushed beyond seven days, the contract can settle 50-50. In practical terms, the consensus remains overwhelmingly with Marcinko, and any value case hinges on event status rather than a fresh read on tennis form.
Methodology
This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- Is this market available outside the US?
- PolyGram 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.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within 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.
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