Gibson vs. Vekic: Match O/U 21.5

Q: Gibson vs. Vekic: Match O/U 21.5

Prediction markets currently price this at 53%. A YES share costs 53.0¢ and pays $1 if it happens. That is a return of 88.7% over 9d.

US Open WTA: Talia Gibson vs Donna Vekic$7k liquidity$0 volumecloses 9d

TennisSportsGames

Trade on Polymarket

BUY YES

Cost: 53.0¢
Implied chance: 53.0%
Return if right: 88.7%
Spread cost: 8%

If you put in $100

You get 188.7 shares at 53.0¢ each.

YES wins: $188.68 back, a profit of $88.68. YES loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $7.40 of that profit. Without it you would make $96.08.

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: 51.0¢
Implied chance: 51.0%
Return if right: 96.1%
Spread cost: 8%

If you put in $100

You get 196.1 shares at 51.0¢ each.

NO wins: $196.08 back, a profit of $96.08. NO loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $8.00 of that profit. Without it you would make $104.08.

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: Aug 28, 07:35 PM4 further outcomes not shown

Latest news

headlines link to their publishers

Headlines are matched on the names in “Gibson vs. Vekic: Match O/U 21.5”. 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 Talia Gibson and Donna Vekic in the US Open WTA, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to "Over" if the total number of games completed equals or exceeds 22. Otherwise, it will resolve to "Under." All tiebreaks, including any Champions/Super tiebreak, count as one (1) game. If the match is postponed or suspended, this market will remain open until the match has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before completion, or if the match has not been completed by September 13, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered determined if it would have been guaranteed had the match been played to completion using the minimum number of additional games required. For example, for a line of 21.5, if play stops at 6-3, 5-6, completing the match would have required at least 2 additional games, resulting in at least 22 games played, so "Over" would resolve as the winning outcome. The primary resolution source for this market will be official Grand Slam statistics; however, a consensus of credible reporting may also be used.

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