Basing vs. Broom: Match O/U 21.5

Q: Basing vs. Broom: Match O/U 21.5

Prediction markets currently price this at 49%. A YES share costs 49.0¢ and pays $1 if it happens. That is a return of 104.1% over 7d.

Roehampton 2: Max Basing vs Charles Broom$1k liquidity$0 volumecloses 7d

TennisSportsGames

Trade on Polymarket

BUY YES

Cost: 49.0¢
Implied chance: 49.0%
Return if right: 104.1%
Spread cost: 8%

If you put in $100

You get 204.1 shares at 49.0¢ each.

YES wins: $204.08 back, a profit of $104.08. YES loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $8.68 of that profit. Without it you would make $112.77.

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: 55.0¢
Implied chance: 55.0%
Return if right: 81.8%
Spread cost: 8%

If you put in $100

You get 181.8 shares at 55.0¢ each.

NO wins: $181.82 back, a profit of $81.82. NO loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $6.86 of that profit. Without it you would make $88.68.

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 27, 03:35 AM4 further outcomes not shown

Latest news

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How this market resolves

This market refers to the tennis match between Max Basing and Charles Broom in the Roehampton 2, originally scheduled for August 27, 2026 at 7:30AM 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 10, 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 Challenger statistics; however, a consensus of credible reporting may also be used.

Source: https://www.atptour.com/en/scores/current