Wimbledon, Qualification WTA: Mariam Bolkvadze vs Jeline Vandromme

Platform comparison

Active sub-markets

Market context

The real-world event is a WTA qualifying match at Wimbledon between Mariam Bolkvadze and Jeline Vandromme, scheduled for 8:00 AM ET on 25 June 2026. In prediction markets, a YES share pays out if the named outcome occurs (here, Bolkvadze advancing), while a NO share pays if it does not. The current crowd-implied probability of YES is 0%, suggesting the market views Bolkvadze’s chance of winning as virtually nil, despite the match having already been completed with Vandromme winning 2–1 in sets [1][5].

Historically, when a match is already finished and the result is known, prediction markets often collapse to near-zero or near-one probabilities depending on the outcome. Comparable cases in tennis qualification rounds show that once a player loses, markets for their advancement resolve to NO almost immediately, reflecting the certainty of the result [3][5]. This explains the 0% YES price: the market is pricing in the known outcome where Vandromme defeated Bolkvadze.

Traders should monitor official WTA and Wimbledon announcements for any post-match corrections, such as match cancellations or rule changes that could trigger a fair-price resolution [6]. While no new news has emerged since the match result, any delay beyond seven days or a tie would reset the market to 50–50, though this is unlikely given the match is complete [1]. The key dependency is the official confirmation of the result, which is already recorded as Vandromme winning [1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Wimbledon, Qualification WTA: Mariam Bolkvadze vs Jeline Vandromme on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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?

On Prediction Market UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 does it cost to trade on Prediction Market UK?

Zero. Prediction Market UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market UK triggers a quick verification flow that finishes in minutes.