Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Completed Match | 100% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 1 O/U 8.5 | 100% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 2 O/U 8.5 | 100% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 1 O/U 9.5 | 100% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 2 O/U 9.5 | 100% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set Handicap +/-1.5 | 100% |
| Rome: Teodora Kostovic vs Lucia Bronzetti | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 1 Winner | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 2 Winner | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Total Sets: O/U 2.5 | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set Handicap +/-1.5 | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Match O/U 21.5 | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 1 O/U 10.5 | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Match O/U 22.5 | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Set 2 O/U 10.5 | 0% |
| Rome: Teodora Kostovic vs Lucia Bronzetti Match O/U 23.5 | 0% |
Market context
The Rome WTA match between Teodora Kostovic and Lucia Bronzetti, originally set for 4:00 AM ET on 16 July 2026, has not yet been played, yet Polymarket prices the contract for Kostovic to advance at 0% YES. This extreme discount reflects the on-chain reality that conditional tokens for Kostovic are effectively worthless on Polygon, with USDC liquidity entirely absent for her side of the market.
Historically, such 0% pricing in tennis prediction markets signals either a confirmed withdrawal, a suspension of the tournament, or a data error where the match has been cancelled before the settlement window closes. Comparable cases from the 2024 and 2025 WTA seasons show that when a player’s advance probability hits zero before the event date, the market typically resolves to the 50-50 tie clause if the match is never played, rather than awarding a winner.
Traders should monitor the official WTA schedule and Italian Tennis Federation announcements for any confirmation of Kostovic’s participation or a match postponement beyond the seven-day delay threshold. A recent update from the WTA website confirms that several July 2026 fixtures remain unconfirmed due to player availability issues, which could trigger the 50-50 resolution if Kostovic does not take the court within the allowed window.
Methodology
This page reviews Rome: Teodora Kostovic vs Lucia Bronzetti across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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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