Warsaw: Teodora Kostovic vs Martyna Kubka

Platform comparison

Market context

The Warsaw WTA 125 meeting between **Teodora Kostovic** and **Martyna Kubka** has already been listed by tennis scoreboards and match pages, with scheduled start times around 09:00–09:30 local time, so the practical question is whether it is played and who progresses rather than whether the pairing exists.[1][3][4] The contract’s **0% YES** crowd-implied price is notably harsher than the tennis-facing consensus: live match pages and tip sites give Kostovic a modest edge in one case, while another modelled preview leans Kubka on the basis of the pair’s only prior meeting.[14][17][18]

Historically, a 0% reading in a player-versus-player market is usually a sign of either stale pricing, thin participation, or a strong expectation that settlement will fall back to the 50-50 “not played” outcome rather than a firm view on the match itself. That matters here because the cross-platform data are mixed: Kubka leads the head-to-head 1-0, winning their 2025 Leimen meeting in straight sets, but Kostovic is rated higher in some rankings snapshots and has been given a slight win probability by at least one independent preview.[2][14][17] In other words, the market price is far below the visible tennis consensus, not in line with it.

The main catalysts to watch are simple: official tournament confirmation that the match is on court, any rescheduling within the seven-day settlement window, and live-score feeds showing whether either player actually advances.[1][3][6] If the start time shifts or the fixture is delayed beyond the window without a winner, this contract resolves to 50-50 by its own terms, which makes draw and postponement risk more important than in a standard head-to-head price. Reuters-style injury or withdrawal reporting would matter, but no such report is present in the available sources.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Warsaw: Teodora Kostovic vs Martyna Kubka across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Best Prediction Markets. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets 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.