Grodzisk Mazowiecki: Filip Pieczonka vs Harold Mayot

Platform comparison

Market context

Filip Pieczonka is due to meet Harold Mayot in the Grodzisk Mazowiecki Challenger, with Mayot the clear class marker on paper: Flashscore lists him around ATP No. 255, while Pieczonka is a much lower-ranked wildcard-level player in the low 1000s.[1][2] That ranking gap helps explain why traditional match pricing and market views should normally lean heavily towards Mayot, even though the prediction market is currently showing **0% YES** on Pieczonka. Comparable listings on tennis and odds sites also frame Mayot as the stronger side, with no head-to-head history to soften the mismatch.[1][2][7]

For traders, the key catalyst is simply whether the match goes ahead as scheduled and which player is named to advance, because the contract settles on advancement rather than straight-set scoreline. Public match pages indicate an August 4 start time in the morning local schedule, but the event has already seen conflicting timestamp displays across platforms, which matters if there is any late reshuffle or court-delay risk.[3][4][5][9] The main watchpoints are official order-of-play updates, any walkover or retirement announcement, and whether the fixture is moved outside the seven-day settlement window; if it is not played or no winner is determined in time, the market resolves 50-50 under the contract terms.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Grodzisk Mazowiecki: Filip Pieczonka vs Harold Mayot across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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 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.