Bunschoten: Gilles Arnaud Bailly vs Filippo Romano

Platform comparison

Market context

The ATP Challenger Round 1 match between Gilles Arnaud Bailly and Filippo Romano at Bunschoten, Netherlands, is scheduled for 13 July 2026 on clay, with the contest set to determine which player advances to the next stage. This first-time encounter features Bailly, ranked ATP 210 with £220,512 career prize money, against Romano, ranked ATP 312 with £133,684, creating a clear hierarchy in professional experience that typically drives heavy market skew toward the higher-ranked entrant [4][6].

Historical data from similar ATP Challenger clay-court first-round matches shows that when a player ranked over 100 spots higher faces a debutant opponent, the implied probability for the lower-ranked player rarely exceeds 5%, yet the current 0% crowd-implied probability suggests an extreme consensus that Romano cannot win, diverging sharply from the modest 15–20% lines often seen in sportsbooks for comparable mismatches [4][8]. This divergence indicates either a lack of liquidity on the prediction market or an overreaction to Bailly’s recent form, which includes a three-set loss in Paris and a quarter-final exit in Tunis, both on clay [9].

Traders should monitor the official ATP Tour start-time confirmation and any pre-match injury reports, as delays beyond seven days or cancellations trigger a 50-50 settlement rather than a decisive outcome [2]. The match’s 4:00 AM ET start time means live odds will shift rapidly once the first serve occurs, and any withdrawal by either player before the contest begins will void the market entirely, requiring immediate position adjustments [1][3].

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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.

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

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.

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 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.