Set 1 Winner: Birrell vs Alexandrova

Q: Set 1 Winner: Birrell vs Alexandrova

Prediction markets currently price this at 98%. A YES share costs 98.0¢ and pays $1 if it happens. That is a return of 2.0% over 9d.

US Open WTA: Kimberly Birrell vs Ekaterina Alexandrova$755 liquidity$0 volumecloses 9d

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Trade on Polymarket

BUY YES

Cost: 98.0¢
Implied chance: 98.0%
Return if right: 2.0%
Spread cost: 97%

If you put in $100

You get 102.0 shares at 98.0¢ each.

YES wins: $102.04 back, a profit of $2.04. YES loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $59.25 of that profit. Without it you would make $61.29.

Assumes the whole order fills at this price. A large order eats into the book and averages worse.

Buy YES on Polymarket

BUY NO

Cost: 74.0¢
Implied chance: 74.0%
Return if right: 35.1%
Spread cost: 78%

If you put in $100

You get 135.1 shares at 74.0¢ each.

NO wins: $135.14 back, a profit of $35.14. NO loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $128.02 of that profit. Without it you would make $163.16.

Assumes the whole order fills at this price. A large order eats into the book and averages worse.

Buy NO on Polymarket

Chance over time

1H 6H 1D 1W 1M ALL

Latest: Sep 1, 02:26 AM4 further outcomes not shown

Latest news

headlines link to their publishers

World number one Sabalenka upset by Alexandrova at Canadian OpenAl Jazeera · 23d ago

Headlines are matched on the names in “Set 1 Winner: Birrell vs Alexandrova”. Nobody checks them by hand, so one may not be relevant. They also say nothing about whether the price has already moved on this news.

How this market resolves

This market refers to the tennis match between Kimberly Birrell and Ekaterina Alexandrova in the US Open WTA, originally scheduled for September 2, 2026 at 11:00AM ET. This market will resolve to “Birrell” if Kimberly Birrell wins the first set. It will resolve to “Alexandrova” if Ekaterina Alexandrova wins the first set. If the match begins but is not completed, and the first set is concluded with a winner determined, this market will resolve based on that completed set. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled (not played at all) or play has not begun by September 16, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve 50-50. Resolution will be based on official Grand Slam match statistics.

Source: https://www.wtatennis.com/scores