Samsun: Koki Matsuda vs Gabriel Debru

Platform comparison

Market context

Koki Matsuda and Gabriel Debru were listed for a Samsun Challenger quarter-final, with live and sportsbook listings showing the match as scheduled and Debru priced as the stronger side; one market feed had Debru around 1.36 and Matsuda around 2.85, while Tennis.com projected Debru at 68% and Matsuda at 32%.[10][14] That means the crowd-implied 0% YES looks far below the pre-match consensus, but the key question today is whether the match actually goes ahead and reaches a completed result, rather than which player is favoured on paper.[10][14]

There is little historical head-to-head framing this one, as the pairing has no prior match-up record in the surfaced data.[3][4] Matsuda’s recent numbers are stronger than his ranking suggests: Matchstat shows a 2025 hard-court record of 21-13 and a 2026 calendar-year win rate above 66%, while Debru’s profile in the same H2H feeds points to similar overall career-level output but without a clear edge in direct meetings.[3][15] In practice, that leaves the market sensitive to in-tournament form, not a long rivalry or repeat pattern.[3][15]

The main catalysts are operational: whether the quarter-final is confirmed on court, whether the start time slips, and whether either player withdraws after the earlier rounds in Samsun.[4][10][14] Live score feeds already showed the match in progress on some trackers, which suggests the event was active in the 24-48 hour window, but prediction-market settlement still depends on an official advance or completion rather than a partial scoreline.[1][2][4] If the fixture is postponed, abandoned, or not completed within the settlement window, the market can still flip to 50-50 under the stated rules.

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

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

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.

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.

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 Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.