Roland Garros, Qualification ATP: Coleman Wong vs Juan Carlos Prado

Platform comparison

Active sub-markets

Market context

Coleman Wong and Juan Carlos Prado are due to meet in Roland Garros qualifying, with the market currently pricing the match as if Wong has almost no chance. That is out of line with the live books in the search results: Sportsbet has Wong at 2.50 and Prado at 1.50 for the match, implying a competitive contest rather than a one-sided walkover. Comparable pricing also points to a fairly tight baseline, with Wong +2.5 games at 2.02 and the over 22.5 games close to even money. In other words, the crowd-implied 0% YES sits well below the sort of probabilities usually associated with an ATP qualifying match where both players are priced in range of each other.

The main trading catalysts are straightforward: whether both players are named in the official Roland Garros qualifying draw, whether the match is kept on schedule, and whether either side withdraws before first ball. Flashscore and TennisLive both list the fixture for 21 May, which supports that the match is on the slate, but qualifying events can still be reshuffled by rain, late withdrawals or administrative walkovers. Prado’s profile also looks strong in the market data, with Sportus assigning him a 69% win probability, while Kalshi has an exact-score market tied to Wong winning 2-0, showing there is live two-way interest rather than a dead market. If the match is not completed within the settlement window, the contract can still be forced back to 50-50 under the stated rules.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Roland Garros, Qualification ATP: Coleman Wong vs Juan Carlos Prado on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.