Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) 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 |
|---|---|
| Completed Match | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 1 Winner | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 1 O/U 8.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 2 O/U 8.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Match O/U 21.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Total Sets: O/U 2.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 2 O/U 9.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 1 O/U 9.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Match O/U 22.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 2 O/U 10.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally Match O/U 23.5 | 100% |
| National Bank Open: Tatjana Maria vs Caty McNally | 0% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 2 Winner | 0% |
| National Bank Open: Tatjana Maria vs Caty McNally Set Handicap +/-1.5 | 0% |
| National Bank Open: Tatjana Maria vs Caty McNally Set Handicap +/-1.5 | 0% |
| National Bank Open: Tatjana Maria vs Caty McNally Set 1 O/U 10.5 | 0% |
Market context
Tatjana Maria and Caty McNally are still listed for their National Bank Open first-round meeting in Toronto, so the main change over the last 24-48 hours is that the match remains unresolved rather than producing a result. Pre-match pricing has been fairly tight, with Tennis.com’s projection putting McNally only marginally ahead at 55% and the market sitting at 38% YES for Maria, which points to a live but not dominant underdog case for the German[1]. Sportschau’s listing also shows the fixture as a first-round match on the Toronto schedule, but without a completed scoreline yet[6].
The historical frame is straightforward: McNally has already beaten Maria in their only completed professional meeting, a three-set grass-court match in July 2025, which gives her the cleaner head-to-head reference[2]. That said, the surface here is hard court, and comparative data show McNally’s recent hard-court level has been stronger than Maria’s overall 2026 form, with McNally carrying the better win rates over the last 12 months and on hard courts[8][9]. A market price below 50% for Maria therefore fits a spot where the younger player’s recent profile and prior head-to-head both lean against her.
For traders, the key catalysts are operational rather than narrative: whether the match is officially started, resumed, or pushed back again, and whether the event keeps to the seven-day settlement rule before 10 August. Any walkover, suspension without completion, or cancellation path matters because the market resolves 50-50 if no winner is determined inside the allowed window, while a completed match settles to the advancing player[6]. The most relevant updates are the tournament order of play, live scoring feeds, and any late scheduling changes from Toronto, especially if rain or court congestion forces a delay beyond the original slot[6].
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 Prediction Today, which mirrors the Polymarket order book directly.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
FAQ
- 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'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.
- 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.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- 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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