US Open, Qualification ATP: Gonzalo Bueno vs Billy Harris

Platform comparison

Market context

Gonzalo Bueno’s US Open qualifying opener against Billy Harris has already been played, with Harris winning 6-1, 6-3 on the New York hard courts. Harris arrived as the slightly higher-ranked player, and the result fit the market logic that favoured the more established hard-court profile rather than a tight coin-flip. [6][11]

For comparison, qualifying markets at the US Open often move quickly once the first set is over or an early break lands, because the format is best-of-three and momentum matters more than in main-draw Grand Slams. A 0% implied chance is consistent with a match that has been completed or effectively decided, rather than a live contest with meaningful upside left in play. [1][10][12]

The main catalyst for traders is whether the event is officially completed in the record before the settlement window closes, since abandoned or uncompleted qualifying matches can still trigger the market’s fallback rules. The published draw and match listings show this was scheduled on Court 4 in the qualifying section, and the result now appears across multiple tennis score services, which reduces the risk of any late uncertainty over the winner. [1][9][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for US Open, Qualification ATP: Gonzalo Bueno vs Billy Harris. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

UK Frequently Asked Questions

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