Contrexeville: Alice Tubello vs Caroline Werner

Platform comparison

Market context

The Grand Est Open 88 in Contrexeville has already delivered a decisive result, with Alice Tubello defeating Caroline Werner 2–0 on the clay courts, overturning the market’s prior 100% YES crowd-implied probability for Tubello to advance [1][2]. This outcome, confirmed within the last 24 hours, means the prediction market will resolve to “Alice Tubello” as she has officially advanced against Werner, rendering the original settlement expectation obsolete [3].

Historically, tennis markets with 100% crowd-implied probabilities for a player to advance have collapsed when live match results contradict pre-tournament assumptions, particularly in early-round clay events where form fluctuates rapidly [4]. Comparable cases from the 2024 and 2025 WTA seasons show that such overconfident pricing often resolves to the actual winner once match data is available, not the pre-match favourite [7].

Traders should now monitor the official WTA tournament draw updates and any post-match injury reports for Tubello, as her progression to the next round depends on her physical condition following this win [8]. Recent coverage from Tennis Tonic confirms Tubello’s first-round victory and lists her next fixture, which will determine whether the market resolves definitively or triggers the 50–50 cancellation clause if the match is delayed beyond seven days [8]. No further betting action is warranted given the match is already completed.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.

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 Prediction Today. 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.