2026 Women’s US Open Winner (Tennis)

Platform comparison

Active sub-markets

Market context

The 2026 U.S. Open Women's Singles tournament runs from 23 August through 13 September at Flushing Meadows in New York. Polymarket currently prices a YES resolution at 28%, implying roughly a one-in-three-point-five chance that a specific player wins the title. This probability reflects the inherent difficulty of predicting a single winner across a 128-player draw where upsets remain commonplace and form fluctuates across the eighteen-month lead time.

Historical context suggests this pricing sits in a reasonable range for pre-tournament markets on major tennis events. Serena Williams won the U.S. Open five times between 2012 and 2014, yet even dominant players rarely commanded probabilities above 20–25% in advance markets due to injury risk and the tournament's open draw structure. The current 28% reflects either concentration on a handful of favourites or genuine uncertainty about which players will peak in August 2026. Comparable markets on the Australian Open or Wimbledon typically see the favourite priced between 15–30%, depending on whether a clear generational talent dominates the field.

Traders should monitor the WTA rankings and injury reports throughout 2025 and early 2026, particularly for players currently ranked in the top ten. The U.S. Open draw announcement in July 2026 will sharpen probabilities considerably, as seeding and bracket positioning affect each player's path to the final. Any significant retirements, career-threatening injuries, or unexpected form collapses among top contenders will shift conditional token values on Polygon substantially in the weeks before the tournament begins.

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 Polymarket Scam?, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Polymarket Scam? 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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Scam? triggers a quick verification flow that finishes in 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.