2026 Men’s US Open Winner (Tennis)

Platform comparison

Active sub-markets

Market context

The U.S. Open men's singles tournament will take place from 23 August to 13 September 2026 at the USTA Billie Jean King National Tennis Center in New York. A YES share on this market represents a bet that a specific listed player will win the championship; a NO share represents a bet that they will not. The market's 52% crowd-implied probability suggests traders are roughly split on whether the named player finishes as champion, reflecting genuine uncertainty about outcomes across a field where injury, form, and draw luck all play decisive roles.

Men's singles at the U.S. Open has historically favoured players with strong hard-court records and deep Grand Slam experience. Between 2015 and 2024, the tournament saw repeat winners (Djokovic, Thiem) and breakthrough champions (Medvedev, Sinner), with the top-ranked player winning roughly 40% of the time. Seeding and draw position matter considerably; players in the top 10 have won 18 of the last 10 editions. The current probability reflects this competitive depth: no single player dominates the field so thoroughly that markets price them above 70%, yet established contenders command meaningful backing.

Traders should monitor player injury announcements and ATP rankings movements through summer 2026, as these directly affect seeding and draw placement announced in late August. Fitness levels heading into the hard-court season, results at the Cincinnati Masters (held immediately before the Open), and any changes to tournament format or scheduling will influence pricing. The settlement window closes on 13 September 2026, allowing resolution within days of the final match.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, 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?

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.

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 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.