Cincinnati Open: Marta Kostyuk vs Sloane Stephens - Aug 25, 2026
Live Polymarket analytics for Cincinnati Open: Marta Kostyuk vs Sloane Stephens - Aug 25, 2026 — $191K volume. Whale positions, bot activity, and order book depth on PolyCollect.
Leading Outcomes
Set 1 Winner: Kostyuk vs Stephens
100%Kostyuk vs. Stephens: Set 1 Games O/U 8.5
100%Kostyuk vs. Stephens: Set 1 Games O/U 9.5
100%Kostyuk vs. Stephens: Set 1 Games O/U 10.5
100%Cincinnati Open: Marta Kostyuk vs Sloane Stephens
100%
Key metrics
Score = Volume + Liquidity + Spread. Whales add a small bonus.
Labels :
- Prime — score 88+ (after rounding), or strong volume + liquidity + tight spread with whales; not Thin
- Active — solid but below Prime thresholds
- Thin — low volume or wide spread (harder to trade size)
- Avoid — dead / illiquid, or market is closed
Not a prediction of how the market resolves
Number of seals (5K+), sharks (25K+) and whales (50K+) present in this market, throughout all outcomes
Outcome Analysis
Per-outcome prices, flow & whale positions
Resolution Criteria
This market refers to the tennis match between Marta Kostyuk and Sloane Stephens in the Cincinnati Open, originally scheduled for August 18, 2026 at 10:00AM ET.
This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Sloane Stephens.
This market will resolve to 'Sloane Stephens' if Sloane Stephens advances against Marta Kostyuk.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.
Resolution source: https://www.wtatennis.com/scores
Related Markets
TrendingTrending by 24h net flow
Resolution Criteria
This market refers to the tennis match between Marta Kostyuk and Sloane Stephens in the Cincinnati Open, originally scheduled for August 18, 2026 at 10:00AM ET.
This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Sloane Stephens.
This market will resolve to 'Sloane Stephens' if Sloane Stephens advances against Marta Kostyuk.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.
Resolution source: https://www.wtatennis.com/scores