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Sports · Polymarket

US Open WTA: Naomi Osaka vs Katerina Siniakova

Trade on Polymarket →
76.60%
03 PM06 PM09 PMWed 0203 AM06 AM09 AM12 PM03 PM06 PM09 PMThu 0303 AM06 AM09 AM12 PM03 PM7072747678808284%76.60%

Stats

24h Volume
$185.8K

Your call

The market says 76.6%. Disagree cheaply, or put a record behind it.

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True cost to trade

The quoted price is not what anyone pays. Below it is the same trade with the spread crossed, the depth consumed and the venue's own fee paid — the break-even probability a buyer would actually need to believe.

Side
Order
PolymarketLive order book
Quoted price76.60%
Spread + depth+0.30 pts
Fee0.00% of stake
Break-even probability76.90%
1300
Shares
$300
Net if it wins

Live Order Book Depth

Spread
0.6¢ (0.8%)
Mid Price
76.6¢
Total Depth
$136,472
Bid/Ask Imbalance
20% bid
Bids (Buy)
76.3¢9
76.2¢13
76.1¢1,156
76.0¢1,299
75.9¢25
75.7¢6,283
75.3¢9
75.2¢250
Asks (Sell)
76.9¢4,802
77.0¢370
77.1¢34
77.2¢25
77.5¢279
77.6¢7,238
77.7¢4,892
77.8¢9
Estimated Slippage to Buy "Yes"
walking the real book
$100 order
76.90¢0.00%
avg fill · slippage
$1,000 order
76.90¢0.00%
avg fill · slippage
$10,000 order
77.32¢+0.55%
avg fill · slippage

Compare Across Platforms

Consensus (2 platforms, liquidity-weighted)76.44%
Platforms disagree by 26.6pts — wider than usual, worth checking each quote below before trusting the average.
PlatformQuestionLive PriceReal Bid / AskWeight
PolymarketUS Open WTA: Naomi Osaka vs Katerina Siniakova76.60%76.3¢ / 76.9¢
99%
Limitless
Furthest from consensus
Naomi Osaka vs Katerina Siniakova50.00%0.1¢ / 99.9¢
1%

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Frequently Asked Questions

What is the current probability for "US Open WTA: Naomi Osaka vs Katerina Siniakova"?

As of the latest update, Polymarket prices this at 76.60%, based on $185.8K in tracked 24h trading volume.

When does this market close?

This contract is scheduled to resolve on or around September 9, 2026, per Polymarket's listed close time.

Where can I trade this market?

This contract trades live on Polymarket. You can view the live order book and trade it directly at the source link on this page.

Is this market listed on other prediction platforms?

Yes — PredictRankd has confirmed this is also listed on: Limitless (50.00%). The real bid/ask-spread-weighted consensus across all 2 platforms is 76.44%. See the full comparison table below.