Granby: Liam Draxl vs James Kent Trotter

Platform comparison

Market context

A tennis match between Liam Draxl and James Kent Trotter at the Granby Challenger, originally set for 14 July 2026, is the real-world event determining this prediction market. A YES share pays out if Liam Draxl advances past Trotter; a NO share pays out if Trotter advances or if the match resolves to the 50–50 default due to cancellation, tie, or excessive delay.

The current crowd-implied probability of 100% YES starkly contrasts with pre-match betting odds, where Draxl was favoured at 1.30 (roughly 77% implied chance) against Trotter’s 3.14 (about 32%) [3]. Polymarket’s own pre-tournament odds listed Draxl at 76% and Trotter at 24%, suggesting the 100% figure likely reflects post-match confirmation rather than pre-game uncertainty [1]. In comparable ATP Challenger markets, probabilities near 100% typically emerge only after a result is confirmed or a player withdraws before play begins, making this an outlier for a match still awaiting settlement.

Traders should monitor official ATP Challenger Granby announcements for any match completion status, player withdrawal notices, or delay rulings beyond the seven-day window, as these directly trigger the 50–50 resolution clause [2]. Tennis Tonic’s preview explicitly picked Draxl to win in two sets, aligning with the dominant market view, but the key catalyst remains formal confirmation that the match was played and completed without disqualification [3]. Until the tournament’s official results page confirms advancement, the 100% price carries settlement risk if the match is declared incomplete.

Sources: 1 · 2 · 3

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 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.