Grodzisk Mazowiecki: Filip Pieczonka vs Harold Mayot

Platform comparison

Market context

Filip Pieczonka against Harold Mayot is priced as a **0% YES** market, which makes the crowd effectively treating Mayot as the only live side. On paper that fits the gap in proven singles level: Pieczonka’s public record is thin at ATP level, with a career-high singles ranking around No. 739 and most of his stronger results coming in doubles, while Mayot is the more established singles operator and should be the consensus favourite if the match goes ahead as scheduled.[1][3][6]

For handicapper context, that sort of near-zero line usually leaves little room for a straightforward favourite bet and shifts attention to whether the underdog has any hidden path through pace, fitness, or surface fit. Pieczonka has shown he can compete regularly on the lower-tier circuit and has a respectable match volume in ITF events, but the available profile still points to a player whose singles ceiling is well below the level implied by a market that gives him no meaningful win chance.[8][15][17] The value case, if any, is contrarian and depends on Mayot being overbet rather than on Pieczonka being suddenly underpriced.

The main catalysts are confirmation of the draw, court assignment, and whether both players remain active in the Grodzisk Mazowiecki schedule, because this market resolves to 50-50 if the match is not played, is tied, or is delayed beyond seven days without a winner.[18] Traders should also watch for late withdrawals, retirement risk, or any reshuffling caused by the tournament order of play, since those are the practical ways a 0% line can be wrong even when the pre-match tennis angle is one-sided.

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 Who Will Win, 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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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'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 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.