Samsun: Koki Matsuda vs Gabriel Debru

Platform comparison

Market context

Koki Matsuda and Gabriel Debru are due to meet in Samsun on hard court, and this prediction market pays on which player advances. In simple terms, a **YES** share resolves if Koki Matsuda wins the match; a **NO** share resolves if Gabriel Debru does. If the match is not completed as described in the rules — for example, if it is cancelled, left unfinished without a winner, or pushed beyond the settlement window — the market can resolve 50-50 instead.

The current crowd price of 0% YES implies that traders are assigning almost no chance to Matsuda advancing, but there is little direct historical evidence between the pair because the head-to-head is listed as unused at professional level. That makes market reading more dependent on recent form and tour context than on past matchup data. Available listings also show Debru with the stronger broader match record over the past 12 months, while Matsuda has the lower live ranking in the mid-500s range in some feeds, which helps explain why sentiment has leaned away from Matsuda. Recent match trackers and preview pages also frame Debru as the projected winner, with one major tennis site giving him roughly a two-thirds chance.

For traders, the key catalysts are straightforward: official start times, whether the match actually begins, and whether either player advances because of a retirement or walkover rather than a completed contest. Challenger events can shift quickly, so late schedule changes or court-order updates matter as much as pre-match form. If the match is delayed, suspended, or never played, the settlement rules here become more important than the on-court scoreline, so the live event status is the main variable to watch.

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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 Market UK, 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 Market UK. 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.