US Open, Qualification ATP: Coleman Wong vs Elmer Moeller

Platform comparison

Market context

Coleman Wong’s US Open qualifying opener against Elmer Møller is priced as a near-certain Wong advance, with the market showing 100% yes on his side and effectively no room for a Moeller upset. On paper, that is more extreme than the live tennis market consensus, where pre-match pricing and projections have been closer to an 80/20 split in Wong’s favour, with Wong also holding the higher seeding and ranking edge at No. 93 to Møller’s No. 172.[1][2][4]

That gap is the main historical context: qualifying markets often overstate certainty when one player is seeded and the other is unseeded, yet first-round ATP qualifying matches can still turn on hard-court form, draw timing and recovery. Wong entered with stronger recent results and a better seed, while Møller’s appeal comes from being the lower-profile, more contrarian side if the match is closer than the pricing suggests; there is no head-to-head history to anchor confidence either way.[2][8][14]

For traders, the key catalysts are straightforward: whether the match is actually completed, and whether any late schedule changes affect the settlement window. The US Open qualifying draw lists the pair in the first round, and match listings placed the contest on Court 5 on 24 August, but the market rules still matter if the match is postponed, abandoned or unresolved by 7 September.[4][10][15]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track US Open, Qualification ATP: Coleman Wong vs Elmer Moeller 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

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 2026. 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.

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.