TennisUPCOMING

Stale· updated 3m ago

National Bank Open: Aoi Ito vs Katherine Sebov

Other · August 2, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.00

Platform Prices — Aoi Ito

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
PolymarketBest	1.68	59.5%	$0.60	---	Bet Here
Kalshi	1.61	62.0%	$0.62	+2.5pp	Bet Here

PolymarketBest

$0.60

Odds

1.68

Implied

59.5%

Edge

---

Bet Here

Kalshi

$0.62

Odds

1.61

Implied

62.0%

Edge

+2.5pp

Bet Here

All Outcomes

Aoi Ito

Best: 62.0% on kalshi

▲+2.5%

Prediction market is 2.5% cheaper than sportsbooks. Consider buying on PM.

59.5%

62.0%

Katherine Sebov

Best: 40.5% on polymarket

▲+0.5%

Prediction market is 0.5% cheaper than sportsbooks. Consider buying on PM.

40.5%

40.0%

Aggregate liquidity

across every venue · the only place this number exists

For each outcome, the total fillable capacity if you split across every venue (Polymarket order-book depth + Kalshi order-book depth + Pinnacle / Bet365 / DraftKings stake limits). A whale can't deploy $50k on Polymarket alone without moving the price — but the same $50k splits cleanly across 4 venues at a much tighter aggregate fill price. That's what this panel shows.

Aoi Ito

cheapest single venue: polymarket at 0.595

Retail tier ($5k/venue)

$10.0K@ 0.684 avg

+7.75% vs cheapest single venue

kalshi$5.0K @ 0.635

polymarket$5.0K @ 0.734

What you can deploy retail-sized across every venue without moving a single market.

Sharp tier ($25k/venue)

$30.0K@ 0.669 avg

+1.97% vs cheapest single venue

kalshi$25.0K @ 0.656

polymarket

Arbitrage Opportunity

+0.50%theoretical onlyPAPER

Fillable up to $127

Aoi Ito (polymarket, $598) — slippage 3.5% — eats into edge

Outcome	Platform	Odds	Stake	To win
Aoi Itothin	polymarket	1.68	$598	$1005
Katherine Sebovthin	kalshi	2.50	$402	$1005

Stake the listed amount on each outcome at the matching platform. Whichever outcome wins, the payout covers the full bankroll plus the margin shown. Verify prices before placing — odds drift quickly.

Cross-Platform Edge — Aoi Ito

Spread

2.5pp

kalshi at 62.0% vs polymarket at 59.5%

Expected Value

+4.20%

Per $1 staked at polymarket (1.68) if kalshi's price is fair.

Kelly Stake

6.2%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: —
24h Volume: —
Liquidity: $10.3K
Open Interest: —

Resolves: in 7d 10h

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

kalshi

updated just now

Volume: $94
24h Volume: $92
Liquidity: $0
Open Interest: $83

Resolves: in 14d 10h

Settlement Timeline

polymarketin 7d 10h · Aug 9, 2026, 6:00 PM
kalshiin 14d 10h · Aug 16, 2026, 5:40 PM

Capital on each platform stays locked until that market settles. When platforms resolve at different times the earlier one frees up bankroll for the next opportunity.

Price History

Illustrative preview · historical tracking coming soon

Trade This Market

Trade on Polymarket Trade on Kalshi

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