Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 1 O/U 8.5 | 100% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 1 Winner | 100% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 1 O/U 9.5 | 100% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 1 O/U 10.5 | 100% |
| Cincinnati Open: Madison Keys vs Xiyu Wang | 97% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 2 Winner | 92% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set Handicap +/-1.5 | 92% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Match O/U 21.5 | 80% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Match O/U 22.5 | 60% |
| Completed Match | 50% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 2 O/U 8.5 | 50% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 2 O/U 9.5 | 50% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Set 2 O/U 10.5 | 50% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Match O/U 23.5 | 18% |
| Cincinnati Open: Madison Keys vs Xiyu Wang Total Sets: O/U 2.5 | 8% |
Market context
Madison Keys meets Xiyu Wang in the Cincinnati Open round of 16, with Keys arriving as the established hard-court favourite after a solid run through the earlier rounds. Keys has already beaten Daria Snigur and Katerina Siniakova in Cincinnati this week, while Wang progressed via a walkover after Elina Svitolina withdrew injured, so her match load is lighter but less tested. Their only previous meeting went to Keys, and it came on grass, which gives little direct guidance for a hard-court contest.
A 97% crowd-implied probability points to a market expecting the favourite to advance, but tennis walkovers and mid-match retirements can still move a market sharply when one player is carrying fitness doubt or when scheduling slips. Keys has had injury interruptions earlier in the season, including a withdrawal from Madrid with illness and a return from an Achilles issue in March, so any fresh medical note, tapering in practice, or court-side treatment would matter. Wang’s route also depends on whether the earlier walkover left her fresh or short of match rhythm, while any change to the Cincinnati schedule, weather delays, or a late reshuffle in the draw would be the main settlement risk to watch.
Methodology
Sports-specific comparison page for Cincinnati Open: Madison Keys vs Xiyu Wang. 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.
- 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.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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