Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) 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 |
|---|---|
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 1 Winner | 100% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 2 O/U 8.5 | 100% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Match O/U 23.5 | 85% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Match O/U 21.5 | 63% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Match O/U 22.5 | 54% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Total Sets: O/U 2.5 | 51% |
| Completed Match | 50% |
| Rome: Deborah Chiesa vs Lucia Bronzetti | 15% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set Handicap +/-1.5 | 5% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set Handicap +/-1.5 | 4% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 2 Winner | 0% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 1 O/U 8.5 | 0% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 2 O/U 9.5 | 0% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 1 O/U 9.5 | 0% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 2 O/U 10.5 | 0% |
| Rome: Deborah Chiesa vs Lucia Bronzetti Set 1 O/U 10.5 | 0% |
Market context
The WTA 125K Rome quarterfinal between Deborah Chiesa and Lucia Bronzetti is scheduled for 1:00 PM ET today, with the on-court projection favouring the Italian favourite Bronzetti at 60%. On Polymarket, the contract for Chiesa advancing trades at a 25% implied probability, reflecting a significant discount against the statistical model and suggesting the crowd prices in Bronzetti’s superior recent form and ranking.
Historical data from similar WTA 125K clashes shows that lower-ranked players like Chiesa often struggle to overcome top-50 opponents when the market assigns them sub-30% win probabilities, yet conditional token liquidity on Polygon can shift rapidly if injury news emerges. In past Rome tournaments, matches involving Italian qualifiers have seen volatility when weather delays or scheduling conflicts intervene, often pushing resolution toward the 50-50 default clause if the match exceeds the seven-day delay threshold.
Traders should monitor the official WTA schedule for any postponement announcements and check real-time USDC liquidity depth on the conditional tokens, as thin books can exaggerate price swings before the match begins. A recent update from Tennis.com confirms Bronzetti is listed as the projected winner, reinforcing the current pricing bias, while any delay beyond the settlement window would trigger the automatic 50-50 resolution regardless of the on-court outcome.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
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
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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 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 Rome: Deborah Chiesa vs Lucia Bronzetti on Kalshi UK
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