Samsun: Koki Matsuda vs Gabriel Debru

Platform comparison

Market context

Polymarket is pricing the Samsun meeting between Koki Matsuda and Gabriel Debru at **0% YES** today, which means the contract is effectively valuing the conditional token at no chance of a straight Matsuda advance unless the market reprices on fresh match information. On Polymarket, that exposure sits inside a USDC market on Polygon, with the outcome determined by the condition attached to whether Matsuda advances against Debru, while a match that is not played, ends level, or is delayed beyond seven days can still push the market to the 50-50 fallback.

The low print sits against a live pre-match context that has not been uniform across sports data feeds. TennisTemple lists the fixture as Samsun 2026, an ATP Challenger quarter-final, while SofaScore and Flashscore had the match scheduled on 31 July with live coverage from Samsun’s outdoor hard court, and Tennis.com’s projection model leaned to Debru as the more likely winner at 68% versus 32% for Matsuda.[2][3][1][5] That kind of split matters for Polymarket users because the contract is not about set score or handicap; it resolves only on who advances, so a priced-out side can still matter if the match is interrupted, retired, or otherwise falls into the settlement edge cases.

For traders, the main catalysts are straightforward: official ATP draw updates, the match starting status, any retirement or walkover notice, and whether the contest is completed within the settlement window. Data feeds already showed inconsistent timing and status labels, with some listings marking the match live and others as upcoming, so the operational risk is less about abstract form than whether the tournament follows through on the posted order of play and produces a clean winner before the fallback deadline.[3][4][6]

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 PolyGram, which mirrors the Polymarket order book directly.

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

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.

Do I need to KYC for this market?

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