Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) 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 |
|---|---|
| Vancouver: Maddison Inglis vs Mai Hontama | 100% |
| Completed Match | 100% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 1 Winner | 100% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 2 Winner | 100% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 1 O/U 8.5 | 100% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 2 O/U 8.5 | 100% |
| Vancouver: Maddison Inglis vs Mai Hontama Set Handicap +/-1.5 | 100% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 2 O/U 9.5 | 100% |
| Vancouver: Maddison Inglis vs Mai Hontama Total Sets: O/U 2.5 | 0% |
| Vancouver: Maddison Inglis vs Mai Hontama Match O/U 21.5 | 0% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 1 O/U 9.5 | 0% |
| Vancouver: Maddison Inglis vs Mai Hontama Match O/U 22.5 | 0% |
| Vancouver: Maddison Inglis vs Mai Hontama Set Handicap +/-1.5 | 0% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 1 O/U 10.5 | 0% |
| Vancouver: Maddison Inglis vs Mai Hontama Match O/U 23.5 | 0% |
| Vancouver: Maddison Inglis vs Mai Hontama Set 2 O/U 10.5 | 0% |
Market context
Maddison Inglis and Mai Hontama are playing a Vancouver quarter-final on outdoor hard courts, with live listings showing Inglis around WTA No 150 and Hontama around No 189. The market’s 100% YES price implies an almost certain Inglis advancement, but the underlying matchup is much closer on the numbers, so that pricing is better read as a position on event status than a pure tennis opinion.[1][12][15]
The historical frame is also not one-way: the pair met in July 2024 on hard courts, where Hontama won 6-2, 6-1, and several head-to-head trackers still show Hontama leading the series 1-0. At the same time, Inglis has shown the slightly stronger recent match trend in some feeds, and Tennis Majors lists no prior meetings since 2022, which underlines how thin the direct sample is and how little a single result should be extrapolated from.[4][5][2][17]
For traders, the main catalysts are whether the match actually starts and whether there is any scheduling disruption at Vancouver, because a cancellation, tie or delay beyond seven days resolves the market to 50-50. If play is live, the key dependency is whether either player is forced to withdraw, as tennis markets can flip on a retirement or walkover even when the pre-match crowd has priced one side at certainty; current match listings and live scoreboards confirm the contest was scheduled for Centre Court on 31 July.[1][11][15]
Methodology
Sports-specific comparison page for Vancouver: Maddison Inglis vs Mai Hontama. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
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