Tampere: Daniel Galan vs Gilles Arnaud Bailly

Platform comparison

Market context

The Tampere Challenger match between Daniel Galan and Gilles Arnaud Bailly, originally set for 20 July 2026, has already concluded with Bailly securing the win, rendering the prediction market’s 0% YES probability for Galan factually aligned with the real-world outcome [1]. This result means the contract will resolve to “Gilles Arnaud Bailly” unless an extraordinary post-match reversal occurs, which tennis rules do not permit for completed matches.

Historically, prediction markets on tennis matches that have already been played show near-total alignment between sportsbook closures and market resolution, with divergence typically arising only from delayed data feeds or walkover ambiguities. In this case, the 0% implied probability mirrors the definitive result, contrasting with early-stage contracts where odds often fluctuate before match completion. Comparable cases from 2024–2025 ATP Challenger events show that once a match is confirmed as finished, market probabilities collapse to 0% or 100% within hours, leaving no meaningful arbitrage opportunity [2].

Traders should monitor official ATP Challenger Tampere communications for any rare administrative corrections, though no such announcements have been issued. The settlement window ending 27 July 2026 provides a final buffer for resolution, but with the match result already confirmed, the catalyst is effectively absent. Recent tournament coverage confirms Bailly’s progression through the osmifinále stage, reinforcing the certainty of the outcome [3].

Sources: 1 · 2 · 3

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Kalshi vs Polymarket. 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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket 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.