The Prediction Markets

Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito

Starts in 2 h 2 minKickoff
Traded
$30K
Venues
Polymarket, Kalshi
Prices updated
54 min ago
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What the markets expect

Birrell 70.3%

Next is Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5 at 65.5%. The venues differ most on Birrell (Polymarket 69.5%, Kalshi 71%), a 1.5-point gap.

Odds by venue

Consensus blends each venue’s last price, weighted by how much has traded there. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

Prices come from our regular polls of each venue, the oldest 54 min ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
Birrell
70.3%
Polymarket 69.5%polled, 54 min agoKalshi 71%polled, 54 min agoBest Yes 70¢ on Polymarket, $100 pays $143 (1.43x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito
Last price
69.5%
As of
Polled 54 min ago
Buy Yes
70¢
Sell Yes
69¢
$100 on Yes pays
$143 (1.43x)
Volume
$4K
Trade this on Polymarket
Kalshi
Contract
Kimberly Birrell
Last price
71%
As of
Polled 54 min ago
Buy Yes
71¢
Sell Yes
70¢
$100 on Yes pays
$141 (1.41x)
Volume
$5K
Trade this on Kalshi
Partial parity

Payoffs match in ordinary outcomes; see the rule differences below the table.

Indicative only, prices are 54 min old: No arbitrage: the best bid elsewhere is 70¢, at or below the cheapest ask of 70¢.

Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
65.5%
Polymarket 65.5%polled, 54 min agoBest Yes 67¢ on Polymarket, $100 pays $149 (1.49x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 1 O/U 8.5
Last price
65.5%
As of
Polled 54 min ago
Buy Yes
67¢
Sell Yes
64¢
$100 on Yes pays
$149 (1.49x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
65.5%
Polymarket 65.5%polled, 54 min agoBest Yes 67¢ on Polymarket, $100 pays $149 (1.49x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 1 Winner
Last price
65.5%
As of
Polled 54 min ago
Buy Yes
67¢
Sell Yes
64¢
$100 on Yes pays
$149 (1.49x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
50%
Polymarket 50%polled, 54 min agoBest Yes 98¢ on Polymarket, $100 pays $102 (1.02x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 2 Winner
Last price
50%
As of
Polled 54 min ago
Buy Yes
98¢
Sell Yes
2¢
$100 on Yes pays
$102 (1.02x)
Trade this on Polymarket
Completed Match
49%
Polymarket 49%polled, 54 min agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Completed Match
Last price
49%
As of
Polled 54 min ago
Buy Yes
97¢
Sell Yes
1¢
$100 on Yes pays
$103 (1.03x)
Volume
$200
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
49%
Polymarket 49%polled, 54 min agoBest Yes 50¢ on Polymarket, $100 pays $200 (2.00x)
Polymarket
Contract
Set Handicap: Kimberly Birrell (-1.5) vs Aoi Ito (+1.5)
Last price
49%
As of
Polled 54 min ago
Buy Yes
50¢
Sell Yes
48¢
$100 on Yes pays
$200 (2.00x)
Volume
$5
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
49%
Polymarket 49%polled, 54 min agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Match O/U 23.5
Last price
49%
As of
Polled 54 min ago
Buy Yes
97¢
Sell Yes
1¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
48%
Polymarket 48%polled, 54 min agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 2 O/U 8.5
Last price
48%
As of
Polled 54 min ago
Buy Yes
96¢
Sell Yes
—
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
48%
Polymarket 48%polled, 54 min agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 2 O/U 9.5
Last price
48%
As of
Polled 54 min ago
Buy Yes
96¢
Sell Yes
—
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
48%
Polymarket 48%polled, 54 min agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 2 O/U 10.5
Last price
48%
As of
Polled 54 min ago
Buy Yes
96¢
Sell Yes
—
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Show 8 more outcomes
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
47.5%
Polymarket 47.5%polled, 54 min agoBest Yes 48¢ on Polymarket, $100 pays $208 (2.08x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Game Spread +/-4.5
Last price
47.5%
As of
Polled 54 min ago
Buy Yes
48¢
Sell Yes
47¢
$100 on Yes pays
$208 (2.08x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
44%
Polymarket 44%polled, 54 min agoBest Yes 45¢ on Polymarket, $100 pays $222 (2.22x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Match O/U 21.5
Last price
44%
As of
Polled 54 min ago
Buy Yes
45¢
Sell Yes
43¢
$100 on Yes pays
$222 (2.22x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
43.5%
Polymarket 43.5%polled, 54 min agoBest Yes 49¢ on Polymarket, $100 pays $204 (2.04x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 1 O/U 9.5
Last price
43.5%
As of
Polled 54 min ago
Buy Yes
49¢
Sell Yes
38¢
$100 on Yes pays
$204 (2.04x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
42%
Polymarket 42%polled, 54 min agoBest Yes 49¢ on Polymarket, $100 pays $204 (2.04x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Match O/U 22.5
Last price
42%
As of
Polled 54 min ago
Buy Yes
49¢
Sell Yes
35¢
$100 on Yes pays
$204 (2.04x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
35%
Polymarket 35%polled, 54 min agoBest Yes 36¢ on Polymarket, $100 pays $278 (2.78x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
Last price
35%
As of
Polled 54 min ago
Buy Yes
36¢
Sell Yes
34¢
$100 on Yes pays
$278 (2.78x)
Volume
$5
Trade this on Polymarket
Aoi Ito
30%
Kalshi 30%polled, 54 min agoBest Yes 31¢ on Kalshi, $100 pays $323 (3.23x)
Kalshi
Contract
Aoi Ito
Last price
30%
As of
Polled 54 min ago
Buy Yes
31¢
Sell Yes
30¢
$100 on Yes pays
$323 (3.23x)
Volume
$21K
Trade this on Kalshi
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
21.5%
Polymarket 21.5%polled, 54 min agoBest Yes 23¢ on Polymarket, $100 pays $435 (4.35x)
Polymarket
Contract
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Set 1 O/U 10.5
Last price
21.5%
As of
Polled 54 min ago
Buy Yes
23¢
Sell Yes
20¢
$100 on Yes pays
$435 (4.35x)
Trade this on Polymarket
Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
18%
Polymarket 18%polled, 54 min agoBest Yes 19¢ on Polymarket, $100 pays $526 (5.26x)
Polymarket
Contract
Set Handicap: Aoi Ito (-1.5) vs Kimberly Birrell (+1.5)
Last price
18%
As of
Polled 54 min ago
Buy Yes
19¢
Sell Yes
17¢
$100 on Yes pays
$526 (5.26x)
Trade this on Polymarket

No cross-venue arbitrage right now: on every matched outcome, the best bid on one venue is at or below the cheapest ask on the other. Find markets with open spreads

Mostly the same bet: two differences

Where they differ

  • If the match is postponed: Kalshi resolves to a fair price if the match does not start within 48 hours of the scheduled time (tennis: not finished within two weeks); Polymarket stays open until the match is played and resolves 50-50 only if it is cancelled with no make-up (tennis: ~14 days).
  • Kalshi requires a ball to be played and pays the winner; Polymarket pays the player who advances, including on retirement. A pre-match walkover is a fair price on Kalshi, 50-50 on Polymarket.
Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: wtatennis.com
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: WTA
Show full rule comparison
  • If the match is postponed: Kalshi resolves to a fair price if the match does not start within 48 hours of the scheduled time (tennis: not finished within two weeks); Polymarket stays open until the match is played and resolves 50-50 only if it is cancelled with no make-up (tennis: ~14 days).
  • Kalshi requires a ball to be played and pays the winner; Polymarket pays the player who advances, including on retirement. A pre-match walkover is a fair price on Kalshi, 50-50 on Polymarket.
  • Trading closes Oct 31, 2026, 4:30 AM UTC on Polymarket and Nov 7, 2026, 1:30 AM UTC on Kalshi.

Summarized from each venue’s published rules; the venue’s own rules page is the final word.

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • Birrell
  • Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5
  • Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5

Live prices for Birrell

What it costs to buy Yes, what you would get selling it, and the last trade on each exchange, updating as orders change. Hover a status for timing details.

Order books

Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.

Combined depth · both venues

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Polymarket

Open on Polymarket ↗

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

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Recent trades

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Kalshi

Open on Kalshi ↗

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

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Recent trades

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What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

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Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.05 × price × (1 − price) per share (sports rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito". Birrell leads at 70.3%. Next is Pan Pacific Open, Qualification: Kimberly Birrell vs Aoi Ito Total Sets: O/U 2.5 at 65.5%. $30K has traded across 18 outcomes on Kalshi and Polymarket. The market is expected to resolve by Oct 31, 2026.

This market refers to the tennis match between Kimberly Birrell and Aoi Ito in the Pan Pacific Open, Qualification, originally scheduled for October 24, 2026 at 12:30AM ET. This market will resolve to 'Kimberly Birrell' if Kimberly Birrell advances against Aoi Ito. This market will resolve to 'Aoi Ito' if Aoi Ito advances against Kimberly Birrell. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 7, 2026, 11:59 PM ET (14 days after the scheduled start), 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.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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